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Science Exercise 14

Key stage 3 Science Exercise

1. There are _______ planets in the solar system.

2. The four inner planets are called Mercury, Venus, Earth and _______ .

3. The four outer planets are called Jupiter, Saturn, Uranus, and _____ .

4. Large collection of stars are called ________ .

5. The name of our galaxy is the _______ .

6. A light year is a unit of _______, light travels in a year is called a light year.

7. Day and night are because of the _________ of The Earth.

8. The earth takes ________ hours to complete one full rotation on its own axis.

9. The earth takes ________ days to complete one full orbit around the Sun.

10. There are ________ seasons.

11. The flow of charge is called _______ .

12. Electricity can flow only in a complete ________ .

13. We use _________ to measure current.

14. We use ________ to measure potential difference in volts.

Answers: 1. eight 2. Mars 3. Neptune 4. galaxy 5. Milky Way 6. distance 7. rotation 8. 24 9. 365 10. 4 11. electric current 12. circuit 13. ammeters 14. voltmeters

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