Plate Tectonics

5. Circulation within fluids caused by differences in density and thermal energy
9. hot fluid or semifluid material below or within the earth's crust
10. A plate boundary where two plates move away from each other
11. The process that occurs when one tectonic plate moves under another
12. secondary seismic waves produced by an earthquake
13. the region of earth's interior between the crust and core.
15. a sudden and violent shaking of the ground
16. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have erupted from the earth's crust.
17. A rigid layer made up of the uppermost part of the mantle and crust

1. How much energy is released by an earthquake
2. When two plates slide past each other
3. a crack or a fracture in Earth's crust where movement can occur
4. A plate boundary where two plates move toward each other
6. The partially melted portion of the mantle
7. the first waves produced by an earthquake
8. the outermost solid shell of earth
14. States that Earth's surface is made up of rigid slabs of rock that move with respect to one another