Earth's Interior

4. rock that makes up the ocean floor
5. boundaries that Form where two tectonic plates separate
9. this is the force that moves the tectonic plates
11. plastic layer within the mantle
12. forms near the edge of a continent at an ocean to continent boundary
18. liquid portion of the core
21. boundaries that form Where two plates collide
23. Scientist that researched whether all the continents had always been in the same place on Earth
24. When the denser plate sinks below the more buoyant plate

1. Dense oceanic plate slides under Less dense continental plate
2. Supercontinent that has broken apart over time
3. Earth’s surface is made of rigid slabs of rock, or plates, that move with respect to each other
6. basalt is rich in this mineral
7. the thick middle layer in the solid part of Earth
8. dense metallic center of Earth
10. Neither plate is subducted, the less dense plate folds and deforms and mountains are formed
13. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
14. hypothesis that the continents are in constant motion on the Earth’s surface
15. brittle, rocky outer layer
16. Very long mountain ranges in the middle of the oceans
17. a rigid layer including the crust and the uppermost mantle
19. solid portion of the core
20. outer part of the magnetic field that affects the charged particles
22. boundaries that Forms where two tectonic plates slide past each other