Across
- 1. acts as a shield from harmful rays
- 3. bang universe originated because of this theory
- 6. earth is the _ planet from the sun
- 8. another name for earth?
- 11. main source of heat and light
- 12. sun-moon-earth
- 14. he first forwarded that the earth is spherical in shape
Down
- 1. all planets revolve around the sun in this direction
- 2. a place in southern egypt located near the tropic of cancer
- 4. the solar family stays together due to this
- 5. essential for all living organisms
- 7. made the first attempt to find out the size of the earth
- 9. it was the ninth planet
- 10. eclipse sun-earth-moon
- 13. number of planets in the solar system