Earth Science Vocabulary

1. When one plate slides under the other when they collide
3. What continental crust is made of
6. Created at convergent boundaries, where two plates push up against each other
8. Occurs at transform boundaries, when pressure builds up in the epicenter
9. A boundary where two plates collide
13. A boundary where two plates slide past each other
16. Pieces of the Earth's crust that make up the floors of the Earth
18. What oceanic crust is made of
19. An idea that is supported by evidence but not completely proven
20. Created at divergent boundaries, where two oceanic crust plates pull apart

2. The theory that all of the continents were once connected, but drifted apart
4. Created at divergent boundaries, where two continental crust plates pull apart
5. Tectonic plates that are less dense, making up the land of the continents
7. The study of tectonic plates
10. A boundary where two plates pull apart
11. Consists of the upper mantle below the lithosphere
12. The combination of the crust and upper mantle
14. Tectonic plates that are more dense, making up the ocean floor
15. The combination of all the continents before they drifted apart
17. Created at convergent boundaries, where magma is pushed up from the mantle