Plate Tectonics Vocaulary

5. the part of the earth's crust that makes up the seafloor
6. the eruption of molten rock (magma) onto the surface of a planet
8. the first waves to arrive at a seismograph
11. places where plates slide sideways past each other
12. a mixture of molten and semi-molten rock found beneath the surface of the earth
13. a large plume of hot mantle material rising from deep within the earth
16. anything thrown into the air during a volcanic eruption
17. the mostly solid bulk of earth's interior
18. two plates comes together
20. a dip-slip fault in which the block above the fault has moved downward relative to the block below

1. a fracture or zone of fractures between two blocks of rock
2. built from particles and blobs of congealed lava ejected from a single vent
3. a point at which rays of light, heat, or other radiation meet after being refracted or refracted
4. two tectonic plates move away from each other
7. is slid and 90% iron
9. comes out of a volcano
10. sudden movement of the earth's lithosphere
14. a large depression formed when a volcano erupts and collapses
15. a seismic body wave that shakes the ground back and forth
19. layer of the earth between the solid inner core and lower mantle