Unit 5 Vocabulary

5. boundaries where the edges of two or more tectonic plates meet
8. theory that states that Earth’s lithosphere is made up of huge plates that move over the surface of Earth
10. plate boundary where two plates move away from each other.
11. plate boundary where two plates move toward each other.
12. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
13. heat from a plume (heated rising rocks in asthenosphere) melts some of the rock in the tectonic plate above – can cause volcanoes to form
14. pulls Earth’s crust
15. Underwater mountain ranges that can form at a divergent boundary.

1. a gap at divergent boundaries where molten material rises to build new crust. This can be at oceanic (mid-ocean ridges) and continental (volcanoes, lakes, rivers)
2. rock is being pushed in opposite directions
3. a section of lithosphere that moves over the asthenosphere carrying pieces of continental and oceanic crust
4. a long narrow trench when one plate goes under another at a convergent boundary.
6. force that acts on rock to change its shape or volume, there are three types
7. A break in the earth's crust
9. plate boundary where two plates slide past each other
11. squeezes Earth’s crust