Across
- 4. An underwater mountain range where new ocean floor is made.
- 5. A big piece of the Earth's surface that moves very slowly.
- 7. A force that tries to push, pull, or twist something.
- 8. The thick middle layer of the Earth.
- 9. The hard outer layer of the Earth, made of rocks and dirt.
- 10. A crack in the Earth where earthquakes can happen.
- 11. The very center of the Earth made of solid paarts.
- 12. The name of the supercontinent that existed long ago.
- 13. A way to measure how strong an earthquake is.
- 16. The soft layer under the hard outer layer where rocks can slowly move.
- 18. The Earth's outer skin.
- 19. Smaller earthquakes that happen after the big one.
- 20. The place right above where an earthquake starts.
- 21. The movement that happens when warm stuff rises and cool stuff sinks.
Down
- 1. A place where hot material from deep within the Earth comes up to the surface.
- 2. The idea that continents move around on the Earth's surface.
- 3. How much stuff is packed into a space.
- 6. When the ground shakes because of energy released from the Earth.
- 14. The part of the Earth's crust that makes up the continents.
- 15. Hot, melted rock that comes out of a volcano.
- 17. A tool that records how much the ground shakes during an earthquake.