Question Paper
Class / Subject: Class 6 (ICSE) · Science
Chapter: Chapter 18 — Chapter 18: The Respiratory System
Time Allowed: 32 minutes
Max Marks: 16
1. Where does air travel after entering our nose? [1]
(A) Down the trachea
(B) Directly to the stomach
(C) Directly to the heart
(D) Nowhere
2. What is the trachea also called? [1]
(A) The windpipe
(B) The food pipe
(C) The blood vessel
(D) The nerve
3. What are alveoli? [1]
(A) Tiny air sacs in the lungs
(B) Blood vessels
(C) Muscles
(D) Bones
4. What happens at the alveoli? [1]
(A) Oxygen and carbon dioxide are exchanged
(B) Food is digested
(C) Blood is filtered
(D) Nothing happens
5. What muscle helps us breathe? [1]
(A) The diaphragm
(B) The heart
(C) The stomach
(D) The liver
6. What does the diaphragm do? [1]
(A) Contracts and relaxes to move air
(B) Pumps blood
(C) Digests food
(D) Nothing useful
7. What system works with the respiratory system? [1]
(A) The circulatory system
(B) The digestive system only
(C) No other system
(D) The skeletal system only
8. Why is the respiratory system important? [1]
(A) It delivers oxygen throughout the body
(B) It has no importance
(C) Only for talking
(D) Only for smelling
9. Where does air travel after entering our nose? [1]
(A) Down the trachea
(B) Directly to the stomach
(C) Directly to the heart
(D) Nowhere
10. What is the trachea also called? [1]
(A) The windpipe
(B) The food pipe
(C) The blood vessel
(D) The nerve
11. What are alveoli? [1]
(A) Tiny air sacs in the lungs
(B) Blood vessels
(C) Muscles
(D) Bones
12. What happens at the alveoli? [1]
(A) Oxygen and carbon dioxide are exchanged
(B) Food is digested
(C) Blood is filtered
(D) Nothing happens
13. What muscle helps us breathe? [1]
(A) The diaphragm
(B) The heart
(C) The stomach
(D) The liver
14. What does the diaphragm do? [1]
(A) Contracts and relaxes to move air
(B) Pumps blood
(C) Digests food
(D) Nothing useful
15. What system works with the respiratory system? [1]
(A) The circulatory system
(B) The digestive system only
(C) No other system
(D) The skeletal system only
16. Why is the respiratory system important? [1]
(A) It delivers oxygen throughout the body
(B) It has no importance
(C) Only for talking
(D) Only for smelling