Plate Tectonics

3. a system that determines the distance of an object under water.
7. the name of the single landmass that broke apart 225million years ago
8. a vibration that travels through Earth carrying energy released in an earthquake (2 wds)
9. a soft layer which floats on the lithosphere
10. the movement of a fluid caused by difference in temperature (2wrds)
11. a ridge layer made up in the upper most part of the mantle
14. a boundary where 2 plates move toward each other
16. the layer of hot solid material between the core and crust
17. the layer of rock that forms Earths outer core
18. the amount of mass in a given space
19. a break in the lithosphere

1. amount of force pushing on an area
2. a dense sphere of solid iron and nickel in the center of the Earth (2wrds)
4. a boundary that moves away from each other
5. a boundary where 2 plates slide past each other
6. a well tested concept that explains a wide range of observations
10. the hypothesis that the continents slowly moved across the Earth’s surface
12. where the oceanic crust sinks beneath a deep ocean trench
13. a deep valley that forms where 2 plates move away from each other
15. a layer of molten iron and nickel(2wrds0