Across
- 4. A small island country that is being split in two by a mid-ocean ridge.
- 9. Molten rock that is above Earth's surface.
- 13. The type of boundary where the plates push together to form mountains.
- 14. A wave that can be caused by an underwater earthquake.
- 15. Molten rock that is below Earth's surface.
- 16. A scientist who studies earthquakes.
- 17. The part of the earth's surface directly above the focus of an earthquake
- 18. The older part of the Earth's crust that is above water.
Down
- 1. A supercontinent that existed approximately 335 million years ago
- 2. The tiny plate found off the coast of Washington
- 3. The system used to measure the intensity of an earthquake.
- 5. The fault that runs the entire length of California.
- 6. The type of boundary where the plates slide past each other.
- 7. How the strength of an earthquake is described.
- 8. The type of boundary where the plates pull away from each other.
- 10. What we call the pieces of the Earth's crust that float on the mantle.
- 11. The newer part of the Earth's crust that is below water.
- 12. A split in the Earth's crust.