Question 1

Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page 127)

Accepted Answer

Cows continue to chew even when they are not eating, as they are ruminating (chewing cud) to aid in the digestion of their foodmore effectively. This allows them to get the nutrients they need from rigid plant material.

Question 2

Is the process of respiration the same in all animals? (Page 128)

Accepted Answer

No, respiration is not the same in all animals. It depends on their size, habitat, and complexity.NCERT Class 7 Science Chapter 9 Question Answer Life Processes in Animals (Exercise)

Source: This question is from Life Processes in Animals, Science &mdash; Class 7, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Life Processes in Animals: Respiration, Same, Animals, Page, Life Processes in Animals, Science. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 7 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Life Processes in AnimalsQ1: Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page...
Q11: Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch...
Q12: Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime...
Q4: Question 4.
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Practice more questions from Life Processes in Animals &mdash; Science, Class 7 CBSE

Question 3

Question 4.

Accepted Answer

Name of the part
Functions

Nostrils
(d) tiny hair and mucus help to trap dust and dirt from the

Nasal passages
(a) fresh air from outside enters

Windpipe
(e) air we breathe air reaches our lungs through this part

Alveoli
(b) exchange of gases occurs

Ribcage
(c) protects lungs

Question 4

What is the role of diaphragm in breathing?
(i) To filter the air
(ii) To produce sound
(iii) To hep in inhalation and exhalation
(iv) To absorb oxygen

Accepted Answer

(iii) To help in inhalation and exhalation

Source: This question is from Life Processes in Animals, Science &mdash; Class 7, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Life Processes in Animals: Diaphragm, Breathing, Filter, Air, Produce, Sound. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 7 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Life Processes in AnimalsQ1: Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page...
Q11: Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch...
Q12: Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime...
Q2: Is the process of respiration the same in all animals? (Page 128)
Q4: Question 4.
Practice more questions from Life Processes in Animals &mdash; Science, Class 7 CBSE

Question 5

Name of the part
Functions
Nostrils
(a) fresh air from outside enters
Nasal passages
(b) exchange of gases occurs
Windpipe
(c) protects lungs
Alveoli
(d) tiny hair and mucus help to trap dust and dirt from the
Ribcage
(e) air we breathe air reaches our lungs through this part

Accepted Answer

Name of the partFunctionsNostrils(d) tiny hair and mucus help to trap dust and dirt from theNasal passages(a) fresh air from outside entersWindpipe(e) air we breathe air reaches our lungs through this partAlveoli(b) exchange of gases occursRibcage(c) protects lungs

Question 6

Anil claims to his friend Sanvi that respiration and breathing are the same process. What question(s) Sanvi ask him to make him understand that he is not correct?

Accepted Answer

Sanvi can ask the following questions to Anil to make him understand that breathing and respiration are not the same process:Do plants breathe? How do they get oxygen?Does the carbon dioxide we exhale come from respiration or breathing?Can we perform respiration without breathing for a short time?Can you give an example of a process that involves breathing but not respiration?

Question 7

Which of the following statement is correct and why?
Anu: We inhale air.
Shanu: We inhale oxygen.
Tanu: We inhale air rich in oxygen.

Accepted Answer

Tanu’s statement is correct: We inhale air rich in oxygen. When we inhale, we take in air that contains about 21% oxygen and exhale air having more carbon dioxide than inhaled air.

Source: This question is from Life Processes in Animals, Science &mdash; Class 7, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Life Processes in Animals: Statement, Correct, Anu, Inhale, Air, Shanu. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 7 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Life Processes in AnimalsQ1: Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page...
Q11: Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch...
Q12: Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime...
Q2: Is the process of respiration the same in all animals? (Page 128)
Q4: Question 4.
Practice more questions from Life Processes in Animals &mdash; Science, Class 7 CBSE

Question 8

Paridhi and Anusha of Grade 7 started running for their morning workout. After they completed their running, they counted their breaths per minute. Anusha was breating faster than Paridhi. Provide at least two possible explanations for why Anusha was breathing faster than Paridhi.

Accepted Answer

Two possible explanations:Anusha might not be fit and healthy, and her lungs were not working efficiently.She might have asthma or a cold, and she was struggling to get enough oxygen.

Source: This question is from Life Processes in Animals, Science &mdash; Class 7, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Life Processes in Animals: Paridhi, Anusha, Grade, Started, Running, Morning. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 7 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Life Processes in AnimalsQ1: Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page...
Q11: Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch...
Q12: Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime...
Q2: Is the process of respiration the same in all animals? (Page 128)
Q4: Question 4.
Practice more questions from Life Processes in Animals &mdash; Science, Class 7 CBSE

Question 9

Yadu conducted an experiment to test his idea. He took two test tubes, A and B, and added a pinch of rich flour to the test tubes half-filled with water and stirred them properly. To test tube B, he added a few drops of saliva. He left the two test tubes for 35-45 min. After that, he added iodine solution into both the test tubes. Experimental results are as shown in Fig. 9.15. What do you think he wants to test?
Fig. Experimental results

Accepted Answer

Yadu wants to test the presence of starch in both test tubes.

Source: This question is from Life Processes in Animals, Science &mdash; Class 7, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Life Processes in Animals: Yadu, Conducted, Experiment, Test, Idea, Took. These are fundamental topics in Science that students are expected to master as part of the CBSE Class 7 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Science papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Life Processes in AnimalsQ1: Cows keep chewing the food even when they are not actively grazing or eating anything. Why? (Page...
Q12: Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime...
Q2: Is the process of respiration the same in all animals? (Page 128)
Q4: Question 4.
Q5: What is the role of diaphragm in breathing? (i) To filter the air (ii) To produce sound (iii) To...
Practice more questions from Life Processes in Animals &mdash; Science, Class 7 CBSE

Question 10

Rakshita designed an experiment taking two clean test tubes, A and B and filled them with lime water as shown in the figure. In test tube A, the surrounding air that we inhale was passed on by sucking air from the pipe, and in test tube B, the exhaled air was blown through the pipe (Fig. 9.16). What do you think she is trying to investigate? How can she confirm her findings?
Fig. Experimental set-up

Accepted Answer

Rakshita is trying to inve stigate the gas we inhale and exhale while breathing. The lime water in test tube B turned milky (or cloudy), but the lime water in test tube A did not. Lime water turns milky when it reacts with carbon dioxide. Therefore, this indicates that the exhaled air contains more carbon dioxide than the air we inhaled.Class 7 Life Processes in Animals Question Answer (Activities)Activity 9.1: Let Us Investigate (Page 123)Table 9.1: Action of saliva on starchTest tubeInitial colour before adding iodineFinal colour after adding iodinePossible reason for the change in colourA: Boiled riceWhiteBlue-blackBoiled rice contains starch, which reacts with iodine to give a blue-black colour.B: Chewed boiled riceWhite or slightly off-whiteNo change/ Faint blue blackSaliva contains a digestive juice that breaks down starch into sugars, reducing the starch content. Hence, little or no blue-black colour appears.Activity 9.2: Let Us Make a Model (Page 130)Fig. (a) Inhalation (b) ExhalationObservation and conclusion:• This experiment mimics the inhalation and exhalation processes of breathing. When the rubber sheet at the base of the bottle is pulled downward, the space inside the bottle increases. As a result, air is drawn into the balloon, and it inflates, just like the lungs do during inhalation. This shows how the diaphragm moves down and creates an area in the chest, allowing air to flow into the lungs.• When the rubber sheet is pushed back upward, the space inside the bottle decreases and pressure increases, forcing air out of the balloon. This shows exhalation, where the diaphragm relaxes and moves up, reducing space and pushing air out of the lungs.Activity 9.3: Let Us Explore (Page 131)Fig. (a) Air is passed into lime water with a pichkari/syringe(b) Air is exhaled into lime waterObservation: The lime water in test tube B turns milky as it receives exhaled air but the lime water in test tube A does not.Conclusion: This indicates that exhaled air contains carbon dioxide. Lime water reacts with carbon dioxide to form calcium carbonate, which causes the milky appearance. The change only in test tube B confirms that more carbon dioxide is present in the air we breathe out than in the air we breathe in.