Across
- 4. A rapture in the earth. Lava, ash, and gases escape
- 6. An instrument that records seismic waves
- 7. A sudden movement of the ground
- 8. The layer of the earth that is cracked to make the tectonic plates
- 9. very large land mass
Down
- 1. The point on the surface directly above the focus
- 2. The amount of energy released. there is only one
- 3. Silicate rock, flows slowly, cools fast
- 5. Plates moving away from each other