Plate Tectonics

5. theory that explains how large pieces of the earht crust move and change shape
8. Harry Hess came up with this idea
9. The center of the earth , like a ball of hot metal. is mostly iron and nickel
16. The hypothesis that states the continents once formed a single landmass, broke up, and drifted to their present location
17. the nature of somethings ingredients or constitutions
18. soft plastic like layer of the mantle on which the tectonic plates move
19. New seafloor, rift-valleys, Mid-Atlantic ridge
20. Stress that occurs when the forces act to squeeze and object

1. A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle
2. is solid but moving (magma, honey) Makes up 66% of the earth
3. strong , lower part of the mantle between the asthenosphere and the outer core
4. Properties that involve a reaction to an applied load strength, ductility, hardness, impact resistance, and toughness
6. Mountains, Trenches, volcanoes, earthquakes, subduction zone
7. The thin, solid, rigid outermost layer of the earth
10. the only liquid layer of the planet. it is iron and nickel
11. The sinking of regions of the earths crust to lower elevations
12. Tectonic plates slide past each other resulting in earthquakes
13. A break in a body of rock along which one block slides relative to another
14. inner most layer of the earth. It is solid iron and nickel
15. Solid outer layer that consists of the crust and the rigid upper part of mantle