Geosphere Review

2. the Earth's crust is broken up into these large slabs of rock
5. in this type of boundary, the plates are moving away from each other
10. in this type of boundary, the plates are moving towards each other
11. the outermost layer of the earth
13. the hypothesis that the continents have slowly moved around the Earth over millions of years
14. rock that is formed from magma or lava cooling down
16. 2nd layer below the earth, made of mostly rocks and magma
17. earthquakes make these types of waves
18. rock that is heated until it is melted becomes this
19. this layer of the earth is made of spinning liquid metal
20. an idea that can be tested
21. a naturally occuring solid that can form by inorganic processes and has a crystal structure and definite chemical composition

1. the process of ocean sea floor falling into the mantle is called this
3. movement of the Earth's plates causes this
4. the innermost layer of the earth, made of solid metal
6. the deepest parts of the ocean floor
7. rock that is formed from smaller rocks pressed together
8. in this type of boundary, the plates are sliding past each other
9. these types of currents can be found in the mantle spreading heat
12. a crack in the Earth's crust, usually in the boundary between two plates
15. rock that is formed from heat and pressure
16. long zipperlike chains of undersea mountains are called this