Earthquakes & Volcanos

2. An area where lava frequently erupts at the surface, independent of plate boundary processes.
4. The name for a sleeping volcano.
6. The single number that geologists use to assign to an earthquake based on its size.
8. This is formed when volcanos at convergent boundaries grow large enough to break the ocean's surface.
12. This is the substance that is formed when magma reaches the Earth's surface.
13. The break in the rock of Earth's crust or mantle.
15. This is the type of plate boundary when two plates collide into each other.
16. The name for a volcano when it is a more immediate threat.
17. The shaking and trembling that results from plate movement.
18. An idea that can be tested by experiments or investigations.

1. The molten mixture of rock-forming substances, gases, and water from the mantle.
3. The name of the one big continent before it drifted apart to make the continents we know today.
5. A wave or series of waves produced by an earthquake or a landslide.
7. A country where you can see volcanos at mid-ocean ridges.
8. The activity of volcanos.
9. The type of plate boundary the forms mid-ocean ridges and rift valleys.
10. The name of the top of a volcano.
11. The force that causes rocks to change their shape or volume.
14. The structure that forms in Earth's crust when molten material reaches the Earth's surface.
19. This is the type of plate boundary when plates slide past each other.