Across
- 3. rock that forms when magma cools and hardens
- 6. explosive release of energy from the sun
- 7. daily changes in the level of ocean water
- 8. Jupiter, Saturn, Uranus, and Neptune
- 11. mixture of mostly invisible gases that surrounds Earth
- 13. all the liquid water on Earth
- 14. mostly solid, rocky part of Earth
- 16. dark areas that form on the surface of the sun
- 17. cycle of warm air rising and cool air sinking
- 19. solid outer layer of Earth
- 20. rock that forms from sediment
- 21. plate boundary where plates slide past each other
- 22. A large group of stars and nebulae
- 23. A small, body of ice, rock, and cosmic dust
Down
- 1. plate boundary where plates move away
- 2. plate boundary where plates collide
- 4. all living things on Earth
- 5. process by which sediment is moved around
- 9. Small, rocky bodies that revolve around the sun
- 10. theory that explains Earth's moving plates
- 12. all frozen water on Earth
- 15. Mercury, Venus, Earth, and Mars
- 18. rock that forms from pressure and heat