Question Paper
Class / Subject: Class 8 (ICSE) · Science
Chapter: Chapter 21 — Chapter 21: Ecosystems
Time Allowed: 32 minutes
Max Marks: 16
1. What is an ecosystem? [1]
(A) Organisms and environment interacting together
(B) Only living organisms
(C) Only the physical environment
(D) Nothing specific
2. What does a food chain show? [1]
(A) Energy flow between organisms
(B) Only plant growth
(C) Only animal behaviour
(D) Nothing useful
3. What is an example of a food chain? [1]
(A) Grass to grasshopper to frog to snake
(B) A car to a road
(C) A book to a shelf
(D) Nothing specific
4. What is a food web? [1]
(A) Multiple interconnected food chains
(B) A single food chain only
(C) No relationship between organisms
(D) A type of habitat
5. What is the carbon cycle? [1]
(A) The movement of carbon through nature
(B) A type of food chain
(C) A type of animal behaviour
(D) Nothing specific
6. What is the nitrogen cycle? [1]
(A) The movement of nitrogen through nature
(B) A type of food chain
(C) A type of animal behaviour
(D) Nothing specific
7. What does understanding ecosystems show? [1]
(A) Interconnection of living things and biodiversity importance
(B) Nothing useful
(C) Only isolated facts
(D) No connections exist
8. Why protect biodiversity? [1]
(A) To maintain healthy, interconnected ecosystems
(B) No reason
(C) It's not important
(D) Only for looks
9. What is an ecosystem? [1]
(A) Organisms and environment interacting together
(B) Only living organisms
(C) Only the physical environment
(D) Nothing specific
10. What does a food chain show? [1]
(A) Energy flow between organisms
(B) Only plant growth
(C) Only animal behaviour
(D) Nothing useful
11. What is an example of a food chain? [1]
(A) Grass to grasshopper to frog to snake
(B) A car to a road
(C) A book to a shelf
(D) Nothing specific
12. What is a food web? [1]
(A) Multiple interconnected food chains
(B) A single food chain only
(C) No relationship between organisms
(D) A type of habitat
13. What is the carbon cycle? [1]
(A) The movement of carbon through nature
(B) A type of food chain
(C) A type of animal behaviour
(D) Nothing specific
14. What is the nitrogen cycle? [1]
(A) The movement of nitrogen through nature
(B) A type of food chain
(C) A type of animal behaviour
(D) Nothing specific
15. What does understanding ecosystems show? [1]
(A) Interconnection of living things and biodiversity importance
(B) Nothing useful
(C) Only isolated facts
(D) No connections exist
16. Why protect biodiversity? [1]
(A) To maintain healthy, interconnected ecosystems
(B) No reason
(C) It's not important
(D) Only for looks