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Class 4 Science Chapter 2 Test 3

Welcome to your Class 4 Science Chapter 2 Test 3

1. 
The sun is the main source of energy in a/an _______.

2. 
The series of eating and being eaten in an ecosystem is called __________.

3. 
Corals are a part of beautiful ecosystem under ________

4. 
Corals look like stone but actually these are _________.

5. 

6. 
The animals which eat plants are called ______

7. 
If the number of the aquatic producers increases in a pond beyond the limit, then fish and other living thing will die due to lack of _________.

8. 
The animals which eat both plants and animals are called ______

9. 
In any food chain the third living thing is a ___________.

10. 
In any food chain the ________ living thing is herbivores.

11. 
Animals produce_______ which is used by plants to make food.

12. 
Which of the following shows the correct food chain in an environment?

13. 
________ are also called rainforests of the ocean.

14. 
The plants make food with the help of :

15. 
Plants produce ______ during photosynthesis.