Across
- 2. A giant system of stars, gas, and dust held together by gravity
- 5. A repeating pattern of weather over a long period of time
- 6. The amount of matter packed into a certain volume
- 8. The process by which rocks are broken down and moved
- 9. The layer of gases surrounding Earth
- 13. Trembling or shaking of Earth caused by movement in Earth’s crust
- 14. The path one object takes around another object in space
- 16. Earth’s spinning motion on its axis
- 19. A rocky object orbiting the Sun, usually found between Mars and Jupiter
- 20. A giant mass of moving ice
- 21. The remains or evidence of ancient life preserved in rock
- 22. The force that pulls objects toward each other
- 23. A natural object that revolves around a planet
Down
- 1. The middle layer of Earth located between the crust and core
- 3. The gigantic collection of all matter, energy, space, and time
- 4. The theory that Earth’s outer shell is broken into moving pieces
- 7. A scientist’s name for all living things in one area interacting together
- 10. Water that falls from clouds in the form of rain, snow, sleet, or hail
- 11. A crack in Earth’s crust where movement occurs
- 12. A huge ball of glowing gas in space
- 15. Molten rock found beneath Earth’s surface
- 16. The movement of Earth around the Sun
- 17. A large storm with rotating winds and a funnel cloud
- 18. The layer of Earth made mostly of solid rock on the surface