Plate Tectonics

2. the point on Earth's surface directly above the focus of an earthquake
5. mountains formed by crust crumpling upwards as plates collide
6. an instrument that detects the seismic waves from an earthquake
7. where plates are moving apart from each other in opposite directions
9. a chain of islands formed at the edges of colliding tectonic plates that where one plate subducts
12. molten rock that has erupted onto the Earth's surface
13. the separating of the continents by drifting across Earth's surface
14. isolated place away from plate boundaries where a lot of magma is collecting
16. molten rock below the earth's surface
17. the center of Earth
19. layer beneath the earth's crust

1. name for the crust and the upper mantle together; Earth's tectonic plates
3. a deep channel in the ocean floor where crust is sinking downwards
4. the place below the ground where and earthquake starts
6. when one plate sinks below another plate during collision
8. a place where extremely hot material from inside the earth erupts at the surface
10. a layer of 'plastic' semi-solid rock in the lower mantle on which Earth's tectonic plates move
11. the rapid movement of the ground, usually back and forth and up and down in a wave motion, due to the movement of tectonic plates
15. a huge wave caused by an earthquake occurring on the sea floor
18. a zone where Earth's crust and mantle are being pulled apart