Class 7 Science Biology Chapter 10 Test Paper Set-2 Pdf Download CBSE

Test Paper Of Class 7 Science Biology Chapter 10 Respiration In Organisms

Class 7 Science Biology Chapter 10 Test Paper Set-2 Pdf

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Chapter 10 Test Paper (02)

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Class 7 Science Biology Chapter 10 Respiration In Organisms Test Paper Set-2 Text Form:-

SAMPLE PAPER (02)                                                                       

CLASS: 7                                                                    MAX.MARKS :30         

SUBJECT: SCIENCE (Bio)                                  TIME: 1:30 HOUR  

CH: 10 (Respiration In Organisms)                                                                                    

General Instructions:                                                                

I.   All questions are compulsory.  

II. This question paper contains 18 questions divided into three Sections:- A, B, and C.

III. Section A has 10 questions of 1 mark each. Section B has 4 questions of 2 mark each and Section C has 4 questions of 3 mark each.

Answers

(Section – A)

In Questions 1 to 10, there are four options, out of which one is correct. Write the correct answer.

1. How many types of respiration are there ?

A. 2                                B. 3

C. 4                                D. 5

2. During heavy exercise, we get cramps in the legs due to the accumulation of.

        (i) carbon dioxide                 (ii) lactic acid

        (iii) alcohol                            (iv) water

3. During exhalation, the ribs.

A. Move outwards

B. Move downwards

C. Move upwards

D. Do not move at all

4. Yeast is used in wine and beer industries because it respires.

        (a) aerobically producing oxygen.

        (b) aerobically producing alcohol.

        (c) anaerobically producing alcohol.

        (d) anaerobically producing CO2 .

5. Normal range of breathing rate per minute in an average adult person at rest is.

A. 9-12                                     B. 15-18

C. 21-24                                   D. 30-33

6. During exhalation, the ribs.

        (i) move outwards                   (ii) move downwards

(iii) move upwards                          (iv) do not move at all

7. Tiny pores on the surface of leaf is called

A. Trachea                               B. Spiracles

C. Stomata                              D. None of the above

8. Breathing is a process that.

       (i) provides O2 to the body.

       (ii) breaks down food to release energy.

       (iii) helps the body to get rid of CO2 .

       (iv) produces water in the cells.

9. In cockroaches, air enters the body through

A. Lungs                                  B. Gills

C. Spiracles                             D. Skin

10. Which of the following gives the correct combination of functions of breathing?

        (a) (i) and (ii)                                  (b) (ii) and (iii)

        (c) (i) and (iii)                                 (d) (ii) and (iv)

(Section – B)

11. Fill in the blanks with suitable words. (a) The roots of a plant take up oxygen from the ______ trapped between the ________ particles. (b) Diaphragm forms the ___________ of the chest cavity. (c) Exchange of gases in the leaves take place with the help of __________. (d) Cockroaches breathe with the help of air tubes called ___________.

12. Which gas present in air is essential for aerobic respiration? What is the role of oxygen during respiration?

13. On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

14. Insects and leaves of a plant have pores through which they exchange gases with the atmosphere. Can you write two points of differences between these pores with respect to their position, number and extension into the body.

(Section – C)

15. Why does an athlete breathe faster and deeper than usual after finishing the race?

16. Observe Figure carefully and answer the following questions.

(a) In which jar, will the amount of CO2 be the highest and why?

(b) In which jar, will the amount of CO2 be the lowest and why?

Class 7 Science Biology Chapter 10 Test Paper Set-2 Pdf

17. A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.

(a) Why did the dough rise?

(b) Why did the dough smell sour?

(c) Why was sugar added to the dough?

(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?

18. Match the names of organisms in Column I with their organs of breathing given in Column II.

Class 7 Science Biology Chapter 10 Test Paper Set-2 Pdf
Answers

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