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Class 4 Science Chapter 7 Test 2

Welcome to your Class 4 Science Chapter 7 Test 2

1. 
Dinosaurs were present on earth ______ of years ago.

2. 
_______is/are called non-renewable resources.

3. 
Dinosaurs are now_______.

4. 
The lavish use of natural resources is causing irreparable ______ to our environment.

5. 
______ are simple solid chemical substances which are present in the earth.

6. 
Those unlimited resources which can be replaced after use are called _____resources.

7. 
Glass is made from:

8. 
An example of non-renewable sources is:

9. 
Air, water, soil, forest and solar energy are ________resources.

10. 
The imprints or remains of many organisms that do not exist in this world now are known as______.

11. 
Recycling saves natural resources by making things________.

12. 
Those resources which cannot be replaced by new ones easily are called ______ resources

13. 
Remains of dead animals and plants found in the earth are called

14. 
About what percentage of the Earth’s surface is land?

15. 
Due to excessive use of natural resources, renewable resources will also run out or will become________.

16. 
To make things reusable is called:

17. 
Coal, petrol, diesel and natural gas are ______ resources.

18. 
The skeletons of many ancient animals are still preserved in:

19. 
Coal, petrol, diesel and natural gas take ______ of years to form

20. 
Some renewable resources are used as ______ substitutes.