plate tectonics

2. a type of fault in which rocks on either side move past each other sideways with little up or down motion
8. the movement of a fluid, caused by differences in tempature,that transforms heat from one part of the fluid to another
10. a plate boundary where two plates move away from each other
12. stress that pushes masses of rock in opposite directions,in a sideways movement
14. an undersea mountain chain where new ocean floor is produced;a divergent boundary under the sea
17. the process by which oceanic crust sinks beneath a deep ocean-trench and back into the mantle at a convergent plate boundary
18. the theory that pieces of earths lithosphere are in constant motion,driven by convection currents in the mantle
19. a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
20. the process by which molten material adds new oceanic crust to the ocean floor

1. a plate boundary where two plates move toward each other
3. a type of fault where the hanging wall slides upward; caused by compression in the crust
4. a dense sphere of solid iron and nickel at the center of earth
5. the layer of hot, solid material between earths crust and core
6. a layer of molten iron and nickel that surrounds the inner core of earth
7. the name of the single landmass that began to break apart 200 million years ago and gave rise to today's continents
9. a type of fault where the hanging wall slides downward;caused by tension in the crust
11. stress that stretches rock so it becomes thinner in the middle
13. the hypothesis that the continents slowly move across earths surface
15. a plate boundary where two plates move past each other
16. stress that squeezes rock until it folds or breaks