vocabulary

3. boundary an area where two or more tectonic plates meet.
4. Boundary ‐The boundary that occurs where two plates are pushing toward each other.
6. melted rock on Earth’s surface.
7. the layer of Earth between the core and the crust; the mantle contains the lower part of the
10. A crack or fracture in Earth's crust where two tectonic plates grind past each other in a horizontal direction.
11. the outermost layer of Earth.
14. continents were joined together in one large landmass.
16. ‐The border between two tectonic plates.
18. plate a large piece of the lithosphere that floats and moves on the asthenosphere.
19. This layer of the earth lies between the mantle and the solid inner core. It is the only liquid
20. the solid outer part of Earth that includes the crust and upper mantle.

1. melted rock beneath Earth’s surface.
2. ‐Molten rock that flows beneath the earth's surface and is made up of gases, liquids, and crystals.
3. The name given to the supercontinent that existed more than 225 million years ago, in which the
5. The type of crust lying under the oceans of the world. It is only 4 to 6 miles
6. a sea of mostly iron and nickel about 1,400 miles (2,300 km) thick.
8. and all of the asthenosphere.
9. is formed when very hot rock rises from the mantle and erupts through Earth’s crust.
12. This dense layer of the earth is made of hot, semisolid rock and is located directly below the crust.
13. magma reaches the surface, it is called lava.
15. trench a long, narrow, deep area on the ocean floor that is formed at a convergent plate boundary.
17. Boundary ‐The boundary that occurs where two plates are moving apart from each other.