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Class 7 Science Case Study Question and Answer: CBSE / NCERT Board Class 7 Science Case Study Question prepared by expert Science Teacher. Students can learn Case Based Question / Paragraph Type Question for NCERT Class 7 Science.

There are total 18 chapter Nutrition in Plants, Nutrition in Animals, Fibre to Fabric, Heat, Acids, Bases and Salts, Physical and Chemical Changes, Weather, Climate and Adaptations of Animals to Climate, Winds, Storms and Cyclones, Soil, Respiration in Organisms, Transportation in Animals and Plants, Reproduction in Plants, Motion and Time, Electric Current and Its Effects, Light, Water: A Precious Resource, Forests: Our Lifeline, Wastewater Story

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CBSE Class 7 Science Case Study Question

• Chapter 1 Nutrition in Plants Case Study Question
• Chapter 2 Nutrition in Animals Case Study Question
• Chapter 3 Fibre to Fabric Case Study Question
• Chapter 4 Heat Case Study Question
• Chapter 5 Acids, Bases and Salts Case Study Question
• Chapter 6 Physical and Chemical Changes Case Study Question
• Chapter 7 Weather, Climate and Adaptations of Animals to Climate Case Study Question
• Chapter 8 Winds, Storms and Cyclones Case Study Question
• Chapter 9 Soil Case Study Question
• Chapter 10 Respiration in Organisms Case Study Question
• Chapter 11 Transportation in Animals and Plants Case Study Question
• Chapter 12 Reproduction in Plants Case Study Question
• Chapter 13 Motion and Time Case Study Question
• Chapter 14 Electric Current and Its Effects
• Chapter 15 Light
• Chapter 16 Water: A Precious Resource
• Chapter 17 Forests: Our Lifeline
• Chapter 18 Wastewater Story

What is Case Study Question?

Ans. At case Study there will one paragraph and on the basis of that concept some question will made. Students have to solve that question.

How many marks will have at case based question?

Most of time 5 questions will made from each case. There will 1 or 2 marks for each question.

Important links:

• Lakhmir Singh Class 7 Solution
• NCERT Class 7 Math Solution

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• Nutrition in Plants Class 7 Case Study Questions Science Chapter 1

Last Updated on April 5, 2024 by XAM CONTENT

Hello students, we are providing case study questions for class 7 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 7 science. In this article, you will find case study questions for cbse class 7 science chapter 1 Nutrition in Plants.

Table of Contents

Case Study Questions on Nutrition in Plants

Question 1:

Read the given passage below and answer the question:

Carnivorous plant is especially adapted for capturing and digesting insects and other animals by means of ingenious pitfalls and traps. There are more than 600 known species of carnivorous plants. The apparent trapping mechanism, which is always a modified leaf is a distinctive feature to these plants. The pitcher plant is an example of a carnivorous plant. The leaf of the Pitcher plant is modified into pitcher like structure to trap the insects. The apex of the leaf acts like a lid which can open and close the mouth of the pitcher.

Q.1. Insect eating carnivorous plants are also called ________plant. (a) autotrophic (b) saprophytic (c) insectivorous (d) symbiotic

Difficulty Level: Easy

Ans. Option (c) is correct. Explanation: Carnivorous plants eat insects for their food requirements, so they are called insectivorous plants.

Q.2. One of the most important nutrients a pitcher plant need from insects is: (a) Carbon dioxide (b) Nitrogen (c) Water (d) Oxygen

Ans. Option (b) is correct. Explanation: Pitcher plants grow in soil that is deficient in nitrogen content so they feed on insects to obtain the nitrogen.

Q.3. Consider the following statements about the Pitcher plant: (A) It is a parasite. (B) The leaves are green in colour. (C) The hair present inside the lid is directed downward. (D) Digestive juice is secreted in the apex of the leaf. The correct statements are: (a) (A) and (B) (b) (B) and (C) (c) (C) and (D) (d) (A), (B) and (D)

Difficulty Level: Difficult

Ans. Option (b) is correct. Explanation: Pitcher plant is not a parasite. The plants are grouped under carnivorous plants as they feed upon insects. The digestive juices secreted in the pitcher, the modified part of leaf.

Q.4. What type of mode of nutrition is found in pitcher plants?

Ans. The pitcher plants have chlorophyll so they perform photosynthesis to produce their own food however, they grow in soil that lacks nitrogen content so, they feed on insects to obtain the nitrogen needed for their growth. Hence, they have both autotrophic as well as a partial heterotrophic mode of nutrition.

Q.5. How does a pitcher plant catch insects? (Medium)

Difficulty Level: Medium

Ans. When the insects land in the pitcher its lid closes and the insects are trapped and entangled into the hair. Digestive juices are secreted in the pitcher so the insects get digested and nutrients get absorbed.

Heat Class 7 Case Study Questions Science Chapter 3

Nutrition in animals class 7 case study questions science chapter 2, topics from which case study questions may be asked.

• Define nutrients.
• Discuss the mode of nutrition in plants.
• Describe the process of photosynthesis.
• List the things required for the process of photosynthesis.
• Discuss what are saprotrophs.
• Describe the symbiosis relationship.
• Discuss the nutrients replenishment in soil.

For further practice on case study questions related to Class 7 Science Chapter 1 Nutrition in Plants, we recommend exploring the link given below.

Frequently Asked Questions (FAQs) on Nutrition in Plants Case Study Questions

Q1: what are case study questions for cbse examinations.

A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.

Q2: Why are case study questions important for understanding class 7 science chapters?

A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.

Q3: How should students approach answering case study questions for CBSE?

A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of plant nutrition, and formulate well-supported solutions or responses.

Q4: Are there any resources available online for students to practice case study questions on class 7 science chapters for CBSE exams?

A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our  website  to access these questions and enhance your learning experience.

Q5: How can students effectively prepare for case study questions on nutrition in plants for CBSE exams?

A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.

Q6: How can teachers incorporate case study questions on nutrition in plants class 7 science into classroom teaching?

A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of nutrition in plants.

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Case Study Questions for Class 7 Science Chapter 2 Nutrition in Animals

• Last modified on: 9 months ago
• Reading Time: 8 Minutes

[Download] Case Study Questions for Class 7 Science Chapter 2 Nutrition in Animals

Here we are providing case study or passage-based questions for class 7 science chapter 2 Nutrition in Animals.

Case Study/Passage Based Questions

Amoeba is a microscopic single-celled organism found in pond water. It has a cell membrane, a rounded, dense nucleus and many small bubble-like vacuoles in its cytoplasm. Amoeba constantly changes it shape and position. It pushes out one or more finger-like projections, called pseudopodia or false feel, for movement or capture of food. 1. A unicellular organism that has contractile vacuoles and in which ingestion of food takes place with the help of cilia is (a) Amoeba (b) Yeast (c) Paramecium (d) None of these 2. Amoeba (a) is a single-celled organism (b) has a rounded, dense nucleus (c) has many small bubble-like vacuoles in its cytoplasm (d) all the above are correct 3. For capture of food, Amoeba (a) pushes out one finger-like projection (b) pushes out one or more finger-like projection (c) both the above are correct (d) one of the above is correct

The partly digested food reaches the lower part of small intestines and digestion of all components of food is completed here by intestinal juice. 1. Proteins change into? (a) amino acid (b) HCl acid (c) pepsin (d) starch 2. Which gland is largest gland in the body? (a) stomach (b) pancreas (c) liver (d) heart 3. Which enzyme is secreted by small intestine? (a) amylase (b) pepsin (c) trypsin (d) HCl

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What is Case Study Question for Class 7 Science?

Case study or passage-based questions in class 7 Science typically require students to read a given scenario or passage and answer questions based on the information provided. These questions assess students’ comprehension, analytical thinking, and application of scientific concepts. 

Best Ways to Prepare for Case Study Questions

To develop a strong command on class 6 Science case study questions, you can follow these steps:

• Read the textbook and study materials:  Familiarize yourself with the concepts and topics covered in your class 6 Science curriculum. Read the textbook thoroughly and take notes on important information.
• Practice analyzing case studies:  Look for case studies or passages related to class 6 Science topics. Analyze the given information, identify key details, and understand the context of the situation.
• Develop comprehension skills:  Focus on improving your reading comprehension skills. Practice reading passages or articles and try to summarize the main points or extract relevant information. Pay attention to details, vocabulary, and the overall structure of the passage.
• Understand scientific concepts:  Ensure that you have a solid understanding of the scientific concepts discussed in class. Review the fundamental principles and theories related to each topic.
• Make connections:  Try to connect the information provided in the case study to the concepts you have learned in class. Identify any cause-effect relationships, patterns, or relevant scientific principles that apply to the situation.
• Practice critical thinking:  Develop your critical thinking skills by analyzing and evaluating the information given in the case study. Think logically, consider multiple perspectives, and draw conclusions based on the evidence provided.
• Solve practice questions:  Look for practice questions or sample case study questions specifically designed for class 6 Science. Solve these questions to apply your knowledge, practice your analytical skills, and familiarize yourself with the format of case study questions.
• Seek clarification:  If you come across any challenging concepts or have doubts, don’t hesitate to ask your teacher for clarification. Understanding the underlying principles will help you tackle case study questions effectively.

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• NCERT Solutions
• NCERT Class 7
• NCERT Class 7 Science

NCERT Solutions For Class 7 Science

Ncert solutions for class 7 science – download pdfs.

NCERT Solutions For Class 7 Science have been provided here to help the students in laying a strong foundation for the subject. The answers to the questions related to the topics present in NCERT Class 7 textbooks are explained in a simple and descriptive manner. NCERT Solutions will improve the quality of the answers the students write in the exam as they will start using a logical approach and methodology while answering the questions.

Class 7 Science NCERT Solutions Chapter-Wise

BYJU’S has explained all the 7th class science concepts comprehensively. If there is any trouble in grasping the topics related to Science, students can refer to the chapter-wise NCERT Solutions covered in CBSE Class 7 Science. Students can check out chapter-wise solutions from the links given below:

The following chapters have been removed from the NCERT Class 7 Science textbook 2023-24.

Fibre to Fabric

Weather, Climate and Adaptations of Animals to Climate

Winds, Storms and Cyclones

Water: A Precious Resource

NCERT Solutions for Class 7 Science

Below, students will find the description of all the chapters of CBSE class 7 science subject.

Chapter 1: Nutrition in Plants

In this lesson, students will learn about nutrients, mode of nutrition in plants, photosynthesis process , other modes of nutrition in plants, and how nutrients are replenished in the soil.

Also access the following resources for Class 7 Chapter 1 Nutrition in Plants at BYJU’S:

• Nutrition in Plants Class 7 Science Notes – Chapter 1
• NCERT Exemplar Solutions Class 7 Science Chapter 1 Nutrition in Plants

Chapter 2: Nutrition in Animals

In the previous chapter, we learnt about nutrition in plants. Now, in this chapter students will learn about nutrition in animals . The chapter starts with the mode of taking food into the body, and then the human digestive system is described in detail with a well-illustrated diagram. Then it describes the digestion of grass-eating animals. At the end of the chapter, feeding and digestion in amoeba is explained.

Also access the following resources for Class 7 Chapter 2 Nutrition in Animals at BYJU’S:

• Nutrition in Animals Class 7 Science Notes – Chapter 2
• NCERT Exemplar Solutions Class 7 Science Chapter 2 Nutrition in Animals

Chapter 3: Fibre to Fabric

This chapter explains the process of obtaining wool and silk. It describes the animals that yield wool and the process through which fibres are converted into wool. Then the topic of silk begins. It describes the life story of the silk moth and the process of obtaining silk from cocoons.

Also access the following resources for Class 7 Chapter 3 Fibre to Fabric at BYJU’S:

• Fibre to Fabric Class 7 Science Notes – Chapter 3
• NCERT Exemplar Solutions Class 7 Science Chapter 3 Fibre to Fabric

Chapter 4: Heat

In the chapter, students understand how we find out whether an object is hot or cold, how to measure temperature . Then this chapter explains about the laboratory thermometer and transfer of heat. At the end it talks about the kind of clothes we wear in summer and winters.

Also access the following resources for Class 7 Chapter 4 Heat at BYJU’S:

• Heat Class 7 Science Notes – Chapter 4
• NCERT Exemplar Solutions Class 7 Science Chapter 4 Heat

Chapter 5: Acids, Bases and Salts

This chapter helps students in understanding the basic definition of acids and bases , types of natural indicators around us, the process of neutralisation and examples of neutralisation in daily life.

Also access the following resources for Class 7 Chapter 5 Acids, Bases and Salts at BYJU’S:

• Acids, Bases and Salts Class 7 Science Notes – Chapter 5
• NCERT Exemplar Solutions Class 7 Science Chapter 5 Acids Bases and Salts

Chapter 6: Physical and Chemical Changes

Through this chapter, students will learn Physical and Chemical changes through various activities. After this, the chapter throws light on the topic, rusting of iron and crystallisation.

Also access the following resources for Class 7 Chapter 6 Physical and Chemical Changes at BYJU’S:

• Physical and Chemical Changes Class 7 Science Notes – Chapter 6
• NCERT Exemplar Solutions Class 7 Science Chapter 6 Physical and Chemical Changes

Chapter 7: Weather, Climate, and Adaptations of Animals to Climate

This chapter starts with the description of weather and climate . Then, it explains the effect of climate on living organisms and how they get adapted to the climate. The polar regions and the tropical rainforests are also explained at the end of this chapter.

Also access the following resources for Class 7 Chapter 7 Weather, Climate, and Adaptations of Animals to Climate at BYJU’S:

• Weather, Climate and Adaptations of Animals to Climate Class 7 Science Notes – Chapter 7
• NCERT Exemplar Solutions for Class 7 Science Chapter 7 Weather Climate And Adaptation Of Animals to Climate

Chapter 8: Winds, Storms and Cyclones

This chapter talks about the natural calamities that destroy human life and cause damage to property. This chapter starts with the properties of air, i.e.,

• Air exerts pressure
• High-Speed winds are accompanied by reduced air pressure
• Air expands on heating

Then the chapter discusses the various situations in which a wind current is generated due to uneven heating on the earth. After that, the chapter explains thunderstorms, cyclones , the destruction caused by cyclones, effective safety measures and how technology helps in protecting us from these disasters.

Also access the following resources for Class 7 Chapter 8 Winds, Storms and Cyclones at BYJU’S:

• Winds, Storms and Cyclones Class 7 Science Notes – Chapter 8
• NCERT Exemplar Solutions Class 7 Science Chapter 8 Wind, Storm And Cyclone

Chapter 9: Soil

Soil is important for life on earth. The chapter starts with the topic soil profile, which describes the different layers of soil. Then the topics like soil types, properties of soil , moisture in the soil, absorption of water by soil, soil and crops are elaborated.

Also access the following resources for Class 7 Chapter 9 Soil at BYJU’S:

• Soil Class 7 Science Notes – Chapter 9
• NCERT Exemplar Solutions Class 7 Science Chapter 9 Soil

Chapter 10: Respiration in Organisms

The chapter starts with an explanation of the respiration process . Then it talks about the breathing process, how we breathe, what we breathe out, how breathing happens in other animals. It also explains how fish breathe underwater and the process of respiration in plants.

Also access the following resources for Class 7 Chapter 10 Respiration in Organisms at BYJU’S:

• Respiration in Organisms Class 7 Science Notes – Chapter 10
• NCERT Exemplar Solutions Class 7 Science Chapter 10 Respiration In Organisms

Chapter 11: Transportation in Animals and Plants

In this chapter, students will learn about the transport of substances in animals and plants. The chapter explains the circulatory system, excretion in animals and transportation of underwater plants in detail.

Also access the following resources for Class 7 Chapter 11 Transportation in Animals and Plants at BYJU’S:

• Transportation in Animals and Plants Class 7 Science Notes – Chapter 11
• NCERT Exemplar Solutions for Class 7 Science Chapter 11 Transportation in Animals and Plants

Chapter 12: Reproduction in Plants

In this chapter, students will learn the various modes of reproduction .  Asexual reproduction takes place through budding, fragmentation and spore formation, whereas sexual reproduction takes place through pollination and fertilization. At the end, the chapter explains fruits and the seed-formation and seed-dispersal processes.

Also access the following resources for Class 7 Chapter 12 Reproduction in Plants at BYJU’S:

• Reproduction in Plants Class 7 Science Notes – Chapter 12
• NCERT Exemplar Solutions Class 7 Science Chapter 12 Reproduction in Plants

Chapter 13: Motion and Time

This is a very interesting chapter that explains the concept of speed, measurement of time , and how to measure speed. At the end of the chapter, the distance-time graph is described to represent the motion of an object in pictorial form.

Also access the following resources for Class 7 Chapter 13 Motion and Time at BYJU’S:

• Motion and Time Class 7 Science Notes – Chapter 13
• NCERT Exemplar Solutions Class 7 Science Chapter 13 Motion and Time

Chapter 14: Electric Current and its Effects

This chapter starts with the topic symbols of electric components. Then it describes the heating effect of electric current, magnetic effect of electric current , electromagnet and electric bell in detail.

Also access the following resources for Class 7 Chapter 14 Electric Current and its Effects at BYJU’S:

• Electric Current and its Effects Class 7 Science Notes – Chapter 14
• NCERT Exemplar Solutions Class 7 Science Chapter 14 Electric Current and Its Effects

Chapter 15: Light

In this chapter, students will get to know that light travels along straight lines. The concepts like reflection of light, plane mirrors , spherical mirrors, and images formed by lenses are also described in detail.

Also access the following resources for Class 7 Chapter 15 Light at BYJU’S:

• Light Class 7 Science Notes – Chapter 15
• NCERT Exemplar Solutions Class 7 Science Chapter 15 Light

Chapter 16: Water – A Precious Resource

Water is essential for all living organisms. This chapter has been added to make students aware of water conservation. The chapter starts with how much water is available on earth. Then it talks about the water cycle and forms of water. Then it explains that groundwater is an important source of water and why we must use it wisely. Further, the concepts of depletion of water and water management have been described. The chapter also throws light on roles that humans can play to save water and the effect of water scarcity on plants.

Also access the following resources for Class 7 Chapter 16 Water – A Precious Resource at BYJU’S:

• Water: A Precious Resource Class 7 Science Notes – Chapter 16
• NCERT Exemplar Solutions for Class 7 Science Chapter 16 Water

Chapter 17: Forests – Our Lifeline

The chapter explains that forest is a system comprising various plants, animals and microorganisms. The various components of forest are interdependent on one another. The interaction between soil, water, air and living organisms takes place in the forest . We should maintain our forests and plant new trees to maintain perfect balance in nature. Otherwise, it will affect our environment badly.

Also access the following resources for Class 7 Chapter 17 Forests – Our Lifeline at BYJU’S:

• Forests: Our Lifeline Class 7 Science Notes – Chapter 17

Chapter 18: Wastewater Story

Water is the lifeline for humans and animals on earth. Emphasizing this, the chapter explains concepts like sewage , treatment of pollutant water, wastewater treatment plants, better housekeeping practices, sanitation and disease, an alternative arrangement for sewage disposal and sanitation at public places.

Also access the following resources for Class 7 Chapter 18 Wastewater Story at BYJU’S:

• Wastewater Story Class 7 Science Notes – Chapter 18
• NCERT Exemplar Solutions For Class 7 Science Chapter 18 Wastewater Story

Benefits of Class 7 NCERT Science Solutions

Our subject experts have explained all the concepts comprehensively with CBSE Class 7 Science revision notes and worksheets. If there is any trouble in comprehending a topic related to Science, the student can refer to the solutions related to every topic covered in  CBSE Class 7  Science.

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Class 7 Science Important Questions, NCERT Solutions | MCQ Tests

Access our premium content for class 7 Science in the form of NCERT Solutions, Revision Notes, Important Questions, Online MCQ Tests, and Learning Videos on myCBSEguide to improve your grades.

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User submitted papers, nutrition in plants, nutrition in animals, fibre to fabric (deleted), acids bases and salts, physical and chemical changes, weather climate and adaptations of animals to climate (deleted), winds storms and cyclones (deleted), soil (deleted), respiration in organisms, transportation in animals and plants, reproduction in plants, motion and time, electric current and its effects, water a precious resource (deleted), forests our lifeline, waste water story, life processes, natural resources and their conservation.

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The basic reason behind incorporating the subject of Science is to cultivate scientific temperament among the learners. As one of the practical subjects, science is of great interest to young minds. In this article, we will know everything about the course of class 7 Science and how can you prepare for the same.

CBSE Class 7 Science Resources

Resources related to CBSE Class 7 Science are available here on myCBSEguide . This includes the class 7 science Syllabus, Question Papers, User Submitted Papers, CBSE Revision Notes, CBSE worksheets, online tests, and learning videos. Our worksheets are available in downloadable PDF format.

Now, why should we choose the study material for class 7 science from myCBSEguide could be a genuine concern of parents, teachers, and students. To answer this, we are glad to inform you that the number of downloads of the  myCBSEguide app on Google PlayStore is more than 5 million, which says it all. This number is increasing day in and day out. Our educational content has been testified by senior teachers who are our regular customers.

Class 7 Science Syllabus & Revision Notes

The syllabus for Class 7 Science is available on the students’ dashboard , it has all the details related to the topics prescribed by the CBSE for Class 7 Science. Before setting off to prepare, one must know the syllabus well. After knowing the syllabus, the next requirement is content that is available in the textbooks. On myCBSEguide you can access the Class 7 Science Textbook in PDF.

Here you can also get Class 7 Science Revision Notes sorted chapter-wise. Notes when used properly can do wonders for the examinees. Also, it helps in understanding the concepts in a much-simplified way. Even if there remains any doubt, students can refer to the learning videos of class 7 Science from the course page. Some of the video links have been provided below.

• 02 Nutrition in Plants
• 03 Modes of Nutrition
• 04 Photosynthesis
• 05 Stomata Guard Cells
• 06 How do plants get nutrients
• 07 Parasitic insectivorous Plants
• 08 Saprotrophs

CBSE Class 7 Science NCERT Solutions

NCERT solutions are important for all CBSE students. These questions become even more important in the higher classes. Hence, students need to develop a habit of solving NCERT questions. For the NCERT Solutions of other subjects check the NCERT Solutions for Class 7 .

NCERT Class 7 Science Chapter-wise Solutions

• Acids, basis, and salts
• Electric current and its effects
• Fibre to Fabric
• Forest our lifeline
• Motion and time
• Nutrition in animals
• Nutrition in plants

Class 7 Science Sample Question Papers and Tests

In the upper primary section, the question papers from various schools serve as model question papers. On our dashboard, you can find various question papers from some of the well-known schools. Books may be different but themes are almost the same. So, to download the class 7 science sample papers, check on our website. These model question papers for class 7 science are available with complete solutions.

Students can also test their acquired knowledge through our test papers and online tests. These small tests are the best tool to provide a drill experience of the examination. Download the myCBSEguide app now to get the quality content for class 7 science.

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CBSE Class 7 Science Case Base Questions

The latest of its kind, case studies questions for class 7 science are available on myCBSEguide. In a bid to encourage competency-based learning, these questions based on real-life scenarios are incorporated to test students’ problem-solving abilities. The case base questions were first introduced for senior classes, i.e., only for the secondary and senior secondary levels. But now, this format is also adopted in the primary and upper primary classes. Get the best of class 7 science case study questions here.

Check out our CBSE module to know about the content of other subjects and classes on myCBSEguide.

• NCERT Solutions for Class 07

Students can download class 7 textbook questions and answers in form of NCERT solution from the myCBSEguide App or Student Dashboard for CBSE students. NCERT publishes books for CBSE and many state boards. In class 7, NCERT has books on English, Hindi, Science Social Science and mathematics. NCERT Solutions – …

CBSE to Conduct Two Term Exams in 2021-22

CBSE has issued a circular on 5th July 2021 regarding the Special Scheme of Assessment for Board Examination Classes X and XII for the Session 2021-22. Here is the complete text of the circular. COVID 19 pandemic caused almost all CBSE schools to function in a virtual mode for the …

CBSE Worksheets for Class 7 All Subjects

CBSE Worksheets for Class 7 All Subjects Maths, Science, Social Science, English and Hindi are available in myCBSEguide App for free download. Worksheets help students to practice the concepts. The most important thing about these practice sets is their composition. We know, creating worksheets is a time-consuming task. Sometimes, we …

NCERT solutions for Class 7 Science

NCERT Solutions for Class 7 Science includes all the questions provided in NCERT Books for 7th Class Science Subject. Here all questions are solved with detailed explanation and available for free to check mycbseguide.com. Book: National Council of Educational Research and Training (NCERT) Class: 7th Class Subject:  Science NCERT solutions …

NCERT solutions for Class 7 Science Winds, storms and cyclones

NCERT solutions for Class 7 Science Winds, storms and cyclones book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT …

NCERT solutions for Class 7 Science Soil

NCERT solutions for Class 7 Science Soil book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class …

NCERT solutions for Class 7 Science Respiration in organisms

NCERT solutions for Class 7 Science Respiration in organisms book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text …

NCERT solutions for Class 7 Science Transportation in animal and plants

NCERT solutions for Class 7 Science Transportation in animal and plants book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from …

NCERT solutions for Class 7 Science Reproduction in plants

NCERT solutions for Class 7 Science Reproduction in plants book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text …

NCERT solutions for Class 7 Science Motion and time

NCERT solutions for Class 7 Science Motion and time book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text …

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CBSE Class 7th Science 2023 : Chapter-wise Competency-Based Test Items with Answers; Download PDF

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• Important Questions for CBSE Class 7 Science Chapter 4 - Heat

CBSE Class 7 Science Chapter-4 Important Questions - Free PDF Download

Important questions for Class 7 Science Chapter 4 are mainly created as a study guide to help students clear their doubts from the chapter in an effective way. Class 7 Science Chapter 4 extra questions and important questions are prepared by our highly experienced teachers having an in-depth knowledge of the subject. These important questions are developed considering the conceptual understanding and precise answering method for examinations. Students can download the Important Questions of Class 7 Science Chapter 4 Heat for free from Vedantu and refer to them to get a better understanding of the chapter. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for better solutions can download Class 7 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

Download Important Questions for Class 7 Science Chapter 4 PDF

Very short answer questions:.

Q1. Hotness of an object is measured using ___________. 

Ans: The hotness of an object is measured using a thermometer . 

Q2. ____________ is the reliable measure of hotness. 

Ans: Temperature is a reliable measure of hotness. 

Q3. The thermometer shown in the figure is ______________.

Clinical Thermometer

Ans: The thermometer shown in the figure is  clinical .

Clinical thermometers are devices that are used to measure the temperature of a human body.

4. Thermometer shown in the diagram is _______________.

Thermometer

Ans: The thermometer shown in the diagram is laboratory.

A laboratory thermometer is a device that is used to measure temperatures in schools or other laboratories for scientific purposes.

5. The red colour shows ____________ temperature and the blue colour shows_________ temperature.

Given picture of Thermometer

Ans: The red color shows maximum temperature and the blue color shows minimum temperature.

Q6. India has adopted the _______ scale for temperature measurement.  

Ans: India has adopted the Celsius scale for temperature measurement. 

Q7. The scale used to measure temperature earlier was the _________________ scale. 

Ans: The scale used to measure temperature earlier was the Fahrenheit scale. 

Q8. The normal body temperature of the human body is _______. 

Ans: The normal body temperature of the human body is 37 o C .

Q9. The _____________in the clinical thermometer prevents the mercury from falling on its own. 

Ans: The kink in the clinical thermometer prevents the mercury from falling on its own. 

Q10. The human body temperature does not rise above ________________.

Ans: The human body temperature does not rise above 42 o C .

Short Answer Questions:

Q1. What is conduction?

Ans: Conduction is the direct movement of heat from one point of an object to another by direct contact. Heat is transferred between materials that are in direct touch with one another. The heated object will transfer heat to every nearby object that comes into direct contact with it, and this process will continue as long as there are objects in contact. It is the most often used mode of transfer of heat in objects.

Phenomenon of Conduction

Q2. What is convection?

Ans: Convection is a heat transport method that occurs in liquids and gases. The fluid is heated unevenly in this manner. A portion of the fluid heats up, expands, and rises. Colder fluids rush in from the surrounding locations to fill the void left by the rising hot fluid. They are heated one by one, and the process is continued until the entire fluid is heated. Winds and storms are caused by the process of convection.

Phenomenon of Convection

Q3. What is radiation?

Ans: Radiation is the transfer of heat between objects that are not in direct touch. The two items may be solids or liquids, but they are not in contact. Heat is transferred from a distance when a heated object radiates heat into the environment. There is no need for a medium for radiation. Because it emits heat to the surroundings, a hot object cools down on its own.

Phenomenon of Radiation

Q4. What are insulators?

Ans: Insulators are poor heat-conducting materials. These materials make it difficult for heat to pass through them. As a result, insulators are utilized to construct handles for cooking pots and pans so that we may grasp them without getting burned. Insulators include materials such as plastic, wood, and rubber.

Q5. What are conductors?

Ans: The materials that conduct heat are called conductors. Heat easily passes through these materials. Cooking utensils, for example, are made with conductors to ensure that the heat from the flame is quickly transferred to the food. Conductors can be made of aluminum, iron, or copper.

Long Answer Questions:  

Q1. What is a sea breeze?

Ans: A sea breeze is a local wind system that flows from the sea to land during the day. This is a common occurrence along the coast. The land heats up faster than the sea during the day. As a result, the air above the ground warms, expands, and rises. The cooler air from the sea rushes in to fill the void that has been created. The air from the land is moving towards the sea. The sea breeze is the wind that blows from the sea towards the land during the day. Houses in coastal areas are built with windows that face the sea to capture the most amount of sea breeze. In the absence of a strong large-scale wind system, sea breezes alternate with land breezes along the coasts of oceans or large lakes during periods of intense daytime heating or nighttime cooling.

Q2. What is a land breeze?

Ans: Land breeze refers to the breeze that blows from the land towards the sea at night. They form at night when both seawater and land lose heat. Because the specific heat capacity of the land is much lower than that of seawater, the land loses heat energy quickly and cools faster than the sea. This is a common occurrence along the coast. The land cools much faster than the seawater at night. As a result, the air above the land cools off more quickly. Above the sea, the air remains warm, expands, and rises. Air from the ground rushes in to fill the void

Land Breeze

Q3. How does wearing woolen clothes keep us warm in winters?

Ans: Woollen clothing is good for the winter since it keeps us warm. This is because-

Wool conducts heat poorly, it does not conduct body heat.

Air trapped between the pores of woolen fibers is a poor heat conductor.

This also reduces the transfer of heat from the body to the environment.

We feel warm because our body heat is trapped within the layers of clothes. Also, having many layers of clothing is preferable to wearing a single thick woolen fabric. This is due to the fact that air is trapped between each layer, trapping more heat. As a result, we feel more comfortable.

Class 7 Science Chapter 4 Heat Summary

Hot and Cold - In this topic, we will learn the effects of heat energy on different materials with practical activities. This will help us to understand the concept in a better way. In our day-to-day life, we have come across many hot and cold objects. For example, tea is hot and ice is cold. The thermometer is a device to measure the temperature of any object or body, mainly we use a thermometer to measure our body temperature.

Measuring Temperature - Measurement of temperature is very important in our day-to-day life. As we know, Doctors use the thermometer to measure body temperature, it is also known as a clinical thermometer. It is long and narrow, made of a uniform glass tube with a bulb at one end. And that bulb contains mercury, which is the main source of measurement in the thermometer. There are two types of scale found on thermometers: one is the Celsius scale and the other is the Fahrenheit scale. Different types of thermometers have different applications like maximum and the minimum thermometer is used for the weather analysis and clinical thermometer is used to measure human body temperature.

Clothes we wear in Summer and Winter - During the summer season, we usually prefer to wear light coloured clothes and in winter we wear dark coloured clothes. The main reason behind it is dark coloured clothes absorb more heat during winter, so we feel more comfortable wearing dark coloured clothes. In vise-versa if we wear light coloured clothes in summer we feel more comfortable as it absorbs less heat most of the light falling on them gets reflected. And we wear woollen clothes during winter as we know, Woolen clothes are a bad conductor of heat.

Transfer of Heat - This will help the student to understand different heat transfers occurring in our surroundings such as frying pan becomes hot when kept on the flame. And it slowly cools down, when the pan is removed from the flame. This happens because heat is a form of energy that spontaneously transfers from hotter objects to cooler objects known as conduction. The materials which allow the heat to pass through them are known as conductors. And the materials through which heat does not pass through it are known as insulators.

Advantages of Practising Important Questions for CBSE Class 7 Science Chapter 4 - Heat

Practicing important questions for CBSE Class 7 Science Chapter 4 - Heat offers several advantages for students, facilitating a comprehensive understanding of the topic. Some of the key benefits include:

Focus on Exam Relevance: Important questions are curated to align with the CBSE examination pattern, enabling students to concentrate on topics that are likely to be asked in the exams.

Thorough Conceptual Clarity: By attempting these questions, students gain a deeper comprehension of the fundamental concepts related to heat, such as thermal expansion, heat transfer, and specific heat.

Application of Knowledge: Important questions often involve problem-solving scenarios, encouraging students to apply their knowledge to real-life situations, thus enhancing their critical thinking abilities.

Time Management: Practicing these questions helps students improve their time management skills as they learn to answer questions within the allocated time frame.

Revision Efficiency: Repeatedly practicing important questions aids in efficient revision, ensuring that students retain the information effectively.

Self-Assessment: By attempting these questions, students can self-assess their level of preparation and identify areas that require further improvement.

Confidence Building: As students solve a wide range of questions, they gain confidence in their ability to tackle different question types and complexities.

Test Preparation: Important questions mimic the examination style, enabling students to feel more prepared and less anxious about the actual test.

Comprehensive Coverage: These questions cover various aspects of the chapter, ensuring that students have a holistic understanding of the topic.

Reinforcement of Learning: Regular practice of important questions reinforces the concepts learned in class, helping students solidify their knowledge.

By going through all Class 7 Science Chapter 4 important questions, students will get a clear understanding of the topics covered in the chapter. Class 7 Science Chapter 4 extra questions and important questions cover all the topics given in this chapter in a concept-based discussion. This question and answer approach can save a lot of time for students during their exam preparation as it becomes easier to revise the chapter by practising these important questions.

FAQs on Important Questions for CBSE Class 7 Science Chapter 4 - Heat

1. What are the basics of Chapter 4 Heat of Class 7 Science?

Heat is a part of the syllabus of Class 7 Science. It is the fourth chapter in the science textbook. The basics of the Chapter Heat include topics involving heating and cooling effects that we feel every day.  Students will learn about the effects of heat energy on various materials with practical activities. This will help students understand the chapter better. We come across many hot and cold objects in our daily life. For example, ice is cold and tea is hot.

2. What are the important questions in Chapter 4 of Class 7 Science?

Vedantu provides students with all the important questions as a study guide to help them clear their doubts from this chapter. All the extra questions and important questions from this chapter are written by experts on this subject to help the students to understand the important topics and concepts better. These important questions are provided by Vedantu from the final examination point of view. The important questions are based on all the important topics and concepts of the chapter. These important questions are available at free of cost on Vedantu(vedantu.com) and mobile app.

3. What can we use to measure the human body temperature?

We need to measure temperature in our daily lives. We can measure our body temperature using a clinical thermometer. This is mainly used by doctors to check the temperature of patients. The thermometer is long and narrow. It consists of a uniform glass tube where the end has a bulb in it. This particular bulb has mercury in it which is considered the main source of temperature measurement. The thermometer consists of two scales, namely the Celsius scale and the Fahrenheit scale.

4. Where can I access NCERT Solutions for important questions for Chapter 4 of Class 7 Science?

Vedantu provides all the important questions of NCERT Solutions for Chapter 4 of Class 7. Students can download NCERT Solutions for important questions of Class 7 Science Chapter 4 Heat for free on Vedantu. These solutions will help students gain a better understanding of this chapter. Students can use Vedantu to access free CBSE NCERT Solutions and other important study materials. This will even help students to revise their syllabus. Apart from this, students will even get the opportunity to score better marks in their examinations.

5. What are the similarities between the laboratory thermometer and the clinical thermometer?

The clinical thermometer is meant for clinical purposes only that are used to measure the human body temperature. Whereas, the laboratory thermometer can be used to measure temperatures apart from the human body temperature. However, the two have a few similarities. For example, both the thermometers have a narrow long uniform glass tube with a bulb at one end of the thermometer. Apart from this, both of them contain mercury and they both use the Celsius scale for measurement.

Chapterwise Important Questions for CBSE Class 7 Science

Cbse study materials.

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Case Study Questions Class 7 Science Respiration in Organisms

Case study questions class 7 science chapter 10 respiration in organisms.

CBSE Class 7 Case Study Questions Science Respiration in Organisms. Important Case Study Questions for Class 7 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Respiration in Organisms.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 7 Science Respiration in Organisms

Case study 1.

A cell is the smallest structural and functional unit of an organism. Each cell of an organism performs certain functions such as nutrition, transport, excretion and reproduction. To perform these functions, the cell needs energy. Even when we are eating, sleeping or reading we require energy. The food has stored energy, which is released during respiration . Therefore, all living organisms respire to get energy from food. During breathing, we breathe in air.

Air contains oxygen. We breathe out air which is rich in carbon dioxide. The air we breathe in is transported to all parts of the body and ultimately to each cell. In the cells, oxygen in the air helps in the breakdown of food. The process of breakdown of food in the cell with the release of energy is called cellular respiration. Cellular respiration takes place in the cells of all organisms. In the cell, the food (glucose) is broken down into carbon dioxide and water using oxygen. When breakdown of glucose occurs with the use of oxygen it is called aerobic respiration. Food can also be broken down, without using oxygen. This is called anaerobic respiration. Breakdown of food releases energy.

Que. 1) What is the smallest structural and functional unit of an organism?

(d) All of the above

  Que. 2) All living organisms derive their energy form which of the following?

(b) Nutrient

Que. 3) The breakdown of glucose in the presence of oxygen is called as …………………………………………………………………………………………………. .

(a) Aerobic respiration.

(b) Anaerobic respiration.

(c) Respiration.

(d) All of the above.

Que. 4) What is cellular respiration?

Que. 5) What is the function performed by each cell of the organisms?

Que. 1) (c) Cell.

Que. 2) (c) Food.

Que. 3) (a) Aerobic respiration.

Que. 4) Answer: The process of breakdown of food or breakdown of complex food particle into simpler form with the release of energy within the cell is called as cellular respiration.

Que. 5) Answer: The function performed by each cell are: Nutrition, absorption of food, transport, excretion of waste materials and reproduction etc.

Case study 2

Our muscle cells can also respireanaerobically, but only for a short time,when there is a temporary deficiency ofoxygen. During heavy exercise, fast

running, cycling, walking formany hours or heavy weight lifting, the

Demand for energy is high. But thesupply of oxygen to produce the energy

Is limited. Then anaerobic respirationtakes places in the muscle cells to fulfil

The demand of energy:

Glucose ____  ( in muscle) in the absence of oxygen ______> lactic acid + energy

The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps. We get relief from cramps after ahot water bath or a massage. Hot water bath or massage improves circulation of blood.As a result, the supply of oxygen to themuscle cells increases. The increase in

the supply of oxygen results in thecomplete breakdown of lactic acid into

carbon dioxide and water.

Que. 1)  Can muscle cells respire anaerobically?

Que. 2) Which substance causes muscle cramps during strenuous workout or any other hardcore training?

(a) Lactose acid

(b) Glucose

(c) Lactic acid

Que. 3) We get relief form cramps after ………………………..……………………………………………..……………………… and ………………………………………………………………………………………… .

(a)  Hot water bath and massage.

(b) Cold water bath.

(c) Massage.

Que. 4)  When is the demand of energy is high in human body?

Que. 5) How is lactic acid broken down?

Que. 1) (a)  True.

Que. 2) (c) Lactic acid.

Que. 3) (a)  Hot water bath and massage.

Que. 4) Answer: The demand of energy is high in the human body when the body put into a lot of physical stress like walking, hiking, cycling, swimming, and running.

Que. 5) Answer: When the supply of oxygen is increased the lactic acid is broken down into carbon dioxide and water.

Case study 3

Breathing means taking in air rich in oxygen and giving out air rich incarbon dioxide with the help of respiratory organs. The taking in of airrich in oxygen into the body is called inhalation and giving out of air rich in carbon dioxide is known as exhalation. It is a continuous process which goes on all the time and throughout the life of an organism.The number of times a personbreathes in a minute is termed as thebreathing rate. During breathing inhalation and exhalation take place alternately.

A breath means one inhalation plus one exhalation On an average, an adult human being at rest breathes in and out 15–18 times in a minute. During heavy exercise, the breathing rate can increase upto 25 times per minute. While we exercise, not only do we breathe fast, we also take deep breaths and thus inhale more oxygen

Que. 1) Breathing means taking in air rich in ………………………………………………………………………………….. and giving out ………………………………………………………………………… with the help of lungs.

(a) Co 2 and O 2

(b) ­ O 2 and Co 2

(c) N 2 and C 2

Que. 2) How much a normal human being breathe during rest?

(a) 15-18 times

(b) 65 times

(c) 100 times

(d) 120 times

Que. 3) What is the breathing rate during heavy exercise?

(a) 30 times

(b) 40 times

(c) 25 times

(d) 100 times

Que. 4)  Define inhalation and exhalation?

Que. 5) Define breathing rate?

Que. 1) ( b) ­ O 2 and Co 2.

Que. 2) ( a) 15-18 times.

Que. 3) ( c) 25 times.

Que. 4) Answer: The intake of air rich in oxygen is called as inhalation and the giving out of air rich in carbon dioxide is called as exhalation.

Que. 5) Answer: Breathing rate is defined as the number of times a person breaths per minute.

Case study 4

Normally we take in air through our nostrils. When we inhaleair, it passes through our nostrils into the nasal cavity. From the nasal cavity,the air reaches our lungs through the windpipe. Lungs are present in the chest cavity. This cavity is surrounded by ribs on the sides. A large, muscular sheet called diaphragm forms the floor of the chest cavity. Breathing involves the movement of the diaphragm and the rib cage. During inhalation, ribs move up andoutwards and diaphragm moves down. This movement increases space in ourchest cavity and air rushes into the lungs. The lungs get filled with air. During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs Smoking damages lungs. Smoking is also linked to cancer. It must be avoided .

Que. 1) From where does we take in air normally?

(c) Nostrils

Que. 2) What is leads to lung cancer?

(a) Smoking

(b) Alcohol

(c) Pollution

Que. 3) Where are the lungs present?

(a) Buccal cavity

(b) Chest cavity

Que. 4)During inhalation how does the ribs move?

Que. 5) Who forms the floor of the chest cavity?

Que. 1) (c) Nostrils.

Que. 2) (a) Smoking.

Que. 3) (b) Chest cavity

Que. 4) Answer: During inhalation the ribs move in upwards and outward directions.

Que. 5) Answer: Diaphragm forms the floor of the chest cavity which is a large muscular sheet.

Case study 5

Animals such as elephants, lions, cows, goats, frogs, lizards, snakes, birds, have lungs in their chest cavities like the human beings. Cockroach: A cockroach has small openings on the sides of its body. Other insects also have similar openings. These openings are called spiracles. Insects have a network of air tubes called tracheae for gas exchange. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body.

Similarly, carbon dioxide from the cells goes into the tracheal tubes and moves out through spiracles. These air tubes or tracheae are found only in insects and not in any other group of animals. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them. Though frogs have a pair of lungs like human beings, they can also breathe through their skin, which is moist and slippery.

Que. 1) Which of the following animal have lungs like human beings?

Que. 2) The trachea is found only in the ……………………………………………………………………………………… and no other group of animals.

Que. 3) …………………………………………………..………………………….. organism can breathe through their skin.

(b) Reptiles

Que. 4) What are the small openings on the sides of cockroach’s body?

Que. 5) How does the skin of earthworms feel on touching?

Que. 1) (d) All of the above.

Que. 2) (a) Insect.

Que. 3) (d) Frog.

Que. 4) Answer: The small opening on the sides of a cockroach’s body is called as spiracle.

Que. 5) Answer: one touching the skin of the earthworm one would feel it moist and slimy.

+these are amazing

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Heat Important Questions Class 7 Science Chapter 4

Heat Class 7 Science Chapter 4 Important Questions and Answers are provided here. We prepared these extra questions based on the latest NCERT Class 7 Science Book. These important questions will help you to properly understand a particular concept of the chapter. Practicing class 7 important questions before the exam will help you to get excellent marks in the exam. 

Class 7 Science Chapter 4 Heat Important Questions

Very short answer type question.

1: Define temperature.

Answer:   A reliable measure of the hotness of an object is its temperature.

2: Name the device used to measure temperature.

Answer:   Thermometer.

3: Name the two types of thermometer.

Answer:  Clinical thermometer and laboratory thermometer.

4: What do you mean by clinical thermometer?

Answer:  Thermometer means to measure our body temperature is called clinical thermometer.

5: The bulb in thermometer contains _____________.

Answer:  Mercury.

6: Thermometer should be washed before and after use with, preferably with an _________ solution.

Answer:  Antiseptic solution

7: Before use the mercury level of thermometer should be below_________________________.

Answer:  35°C

8: We should hold the thermometer by the bulb while holding it. True/False.

Answer:  False

9: What is the unit of temperature as adopted by India?

Answer:  Degree Celsius (°C )

10: What is the average body temperature of a healthy person?

Answer:  37°C

11: What is the range of laboratory thermometer?

Answer:  – 10°C to 110°C

12: Laboratory thermometer should be kept upright and not tilted. True/False.

Answer:   True.

13: The bulb of laboratory thermometer should not touch the surface of the ________________.

Answer:  Container.

14: What is the use of kink in a clinical thermometer?

Answer:  Kink prevents mercury level from falling on its own.

15: Give an example to show the transfer from heat from one body to another.

Answer:  Any utensil kept on flame, becomes hot because heat transfers from flame to the utensil.

16: Heat always flows from a hotter object to ________________________.

Answer:  Colder object.

17: Give examples of conductors.

Answer:  Aluminium, copper, iron etc.

18: Give examples of insulators.

Answer:   Water, air, etc.

19: Insulators are ________ conductor of heat.

Answer:   Poor

20: Conductors are _____________ conductor of heat.

Answer:   Good

21: Name the process by which heat transfer in air.

Answer:   Convection.

22: From the sun the heat comes to us by the process called __________________.

Answer:   Radiation.

23: Transfer of heat by radiation requires any medium or not?

Answer:   Not.

24: All hot bodies __________________ heat.

Answer:   Radiates.

25: An iron rod at 30°C is dropped by chance into a bucket containing water at 30°C, the heat will flow or not in this case?

Answer:   No.

26: Which of the two absorbs more radiation- a dark coloured object or a light coloured object?

Answer:   A dark coloured object.

27: Temperature of boiling water cannot be measured by a ________________________.

Answer:   Clinical thermometer.

28: Land breeze blows at the time of ______________.

Answer:   Night.

29: Sea breeze blows at the time of ______________.

Answer:   Day

30: Which type of cloth should be preferred in the month of June?

Answer:   Light coloured clothes

31: Which type of cloth should be preferred in the month of January?

Answer:   Dark coloured clothes.

32: A cold steel spoon is dipped into a cup of hot coffee, it will transfer heat to its other end or not? If yes then by which process?

Answer:   Yes, by conduction.

Short Answer Type Questions

1: Define heat.

Answer:   Heat is a form of energy, entry or exit of which correspondingly increases or decreases internal energy of a body when no work is done on the body or by the body. It is measured in joule or calories.

2: Define temperature. What is its unit?

Answer:   A reliable measure of the hotness of an object is its temperature. Temperature is measured by a device called thermometer. Unit of temperature is degree Celsius (°C), Fahrenheit and Kelvin (SI unit).

3: What is the use of the maximum – minimum thermometer?

Answer:   Different types of thermometers are used for different purposes. The maximum and minimum temperatures of the previous day, reported in weather reports, are measured by a thermometer called the maximum – minimum thermometer.

4: Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?

Answer:   Kink prevents mercury level from falling on its own.

5: Why clinical thermometer ranges from 35°C to 42°C?

Answer:   The normal temperature of human body is 37°C.The temperature of human body normally does not go below 35°C or above 42°C. That is the reason that a clinical thermometer has the range 35°C to 42°C.

6: What is conduction?

Answer:   Heat flows from a hotter object to a colder object. The process by which heat is transferred from the hotter end to the colder end of an object is known as conduction.

7: Why conduction is only possible in solids?

Answer:   In solids, generally, the heat is transferred by the process of conduction because particles of solids are closely packed and heat is transferred from the hotter end to the colder end of an object.

8: How does the heat from the sun reach us?

Answer:   It cannot reach us by conduction or convection as there is no medium such as air in most part of the space between the earth and the sun. From the sun the heat comes to us by a different process known as radiation which does not require any medium for heat transfer.

9: Differentiate between conductor and insulators?

Answer:   The materials which allow heat to pass through them easily are conductors of heat. For examples, aluminium, iron and copper The materials which do not allow heat to pass through them easily are poor conductors of heat known as insulators such as plastic and wood.

10: Explain land breeze.

Answer:   At night, the water cools down more slowly than the land. So, the cool air from the land moves towards the sea. This is called the land breeze.

11: Explain sea breeze.

Answer:   During the day, the land gets heated faster than the water. The air over theland becomes hotter and rises up. The cooler air from the sea rushes in towards the land to take its place. The warm air from the land moves towards the sea to complete the cycle. The air from the sea is called the sea breeze.

12: In summer we prefer light-coloured clothes and in winter we usually wear dark-coloured clothes. Explain Why?

Answer:   Dark surfaces absorb more heat and, therefore, we feel comfortable with dark coloured clothes in the winter whereas light coloured clothes reflect most of the heat that falls on them and, therefore, we feel more comfortable wearing them in the summer.

13: Why one thick blanket is less warm up than two thin blankets joined together?

Answer:   There is a layer of air in between the blankets. Since air is bad conductor of heat prevent body heat to escape out, two thin blankets provides more heat than one thick blanket.

14: How Woollen clothes keep us warm in winter?

Answer:   Woollen clothes keep us warm during winter. It is so because wool is a poor conductor of heat and it has air trapped in between the fibres.

17: What is the unit of heat?

Answer:   Units of Heat (a) C.G.S. unit of heat is Calorie. (b) The M.K.S. or S.I. unit of heat is Joule “1 calorie equals 4.18 or 4.2 joules approximately.”

18: Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.

Answer:   In between the layers of cloths there is trapped air. As air is bad conductor of heat so the outside low temperature does not get transferred to body as well as prevent our body heat to escape outside. Hence more layers of cloths keep us warmer during cold winter.

19: In places of hot climate it is advised that the outer walls of houses be painted white. Explain.

Answer:   In places of hot climate it is advised that the outer walls of houses be painted white because a light colour absorbs very less radiant heat and we feel comfortable inside such houses due to lower temperature inside house.

20: How heat and temperature of substance are related to each other.

Answer:   Heat is the total energy of the molecular motion of the substance and temperature is the measure of average energy of the molecular motion in the substance. When we heat a substance it increases the motion of vibrating molecules of the substance thereby increasing the temperature of the substances.

21: Define specific heat.

Answer:   Specific heat is a fundamental property of matter. An equal mass of different materials absorb or give out different quantities of heat, even if they are heated or cooled through the same range of temperature. This is also called specific heat capacity (abbreviated as SHC) in S.I. system.

22: What you should choose in winter one thick blanket or two thin blankets joined together? And why?

23: What is thermal equilibrium?

Answer:   Heat always from a body of higher temperature to a body of lower temperature, until the temperature of both bodies are equal, then the two bodies are said to be in thermal equilibrium.

24: Which property of liquids is used in making thermometer?

Answer:   The property of thermal expansion of liquids is used in making thermometers. It states liquid expands on heating and contracts on cooling.

Long Answer Type Questions

1: Explain how water heated by convection?

Answer:   The water is poor conductor of heat so do not heated by conduction. When water is heated, the water became lighter. Hot water rises up. The cold water from the sides moves down towards the source of heat. This water also gets hot and rises upward and water from the sides moves down. This process continues till the whole water gets heated. This mode of heat transfer is known as convection.

2: What is the Relation between Celsius, Fahrenheit and Kelvin scales?

Answer:   Since the range of temperature from ice-point to steam-point is equal in all the three scales, 100 centigrade degrees = (212 – 32) or 180 Fahrenheit degrees = (373 – 273) or 100 absolute degrees. We consider three thermometers in the above three scales are dipped simultaneously in a liquid of certain temperature. Let the temperatures recorded in the Celsius, Fahrenheit and Kelvin thermometers respectively be C, F and K. Now it can be proved that C / 5 = F- 32 / 9 = K- 273 /5.

3. State similarities between the laboratory thermometer and the clinical thermometer.

Answer:  

• Laboratory thermometer and the clinical thermometer consist of a long, narrow, uniform glass tube.
• Laboratory thermometer and the clinical thermometer have a bulb containing mercury at the end of the tube.
• Laboratory thermometer and the clinical thermometer are marked with Celsius scale on the glass tube.

4: State differences between laboratory thermometer and clinical thermometer.