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Class 4 Science Chapter 5 Test 1

Welcome to your Class 4 Science Chapter 5 Test 1

1. 
_______ travels in all directions in straight lines.

2. 
How electricity is produced in thermal power station.

3. 
There are _________colors in sunlight.

4. 
Candle, oil lamp, torch, electric bulb are the ________sources of light.

5. 
________ is the form of energy that is produced by vibrations in an object.

6. 
Coal, oil and gas are made in _______ of years.

7. 
When light strikes the shiny and smooth surface of mirror, it bounces back and enters our eye; this is called ___________of light.

8. 
In windmill, electricity is produced from the energy of_______.

9. 
_______ can be transformed into another form.

10. 
Due to _________ of light, we can see our image in mirror.

11. 
Water (flowing), air, coal, oil, gas and wood are the sources of______.

12. 
How hydroelectricity is made?

13. 
The biggest source of energy is the______.

14. 
The sun, stars and lighting are the _______sources of light.

15. 
The ability to do work is called ________.