Across
- 2. energy produced with running water
- 4. ability to do work
- 5. instrument studying planets
- 8. energy source that can be use again
- 9. example of insulator
- 12. fossil fuel
- 13. imaginary line
- 15. form of heat transfer
- 16. earth's closest natural satellite
- 17. parts working together
- 18. curved path of a body around a larger body
Down
- 1. pulling force
- 3. result of the earth revolving around the sun
- 5. rise and fall of ocean levels
- 6. planet called home
- 7. form of heat transfer
- 10. keeping things hot or cold
- 11. study of space and the universe
- 14. made from maize , soybeans
- 15. form of heat transfer
- 19. movement in a circular path