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