Plate Tectonics

4. Molten rock stored beneath Earth's surface
7. The process that results when a dense oceanic plate sinks beneath a more buoyant plate
8. The type of rock that forms when lava crystallizes and cools
9. The thick middle layer of the Earth
12. The process by which new oceanic crust forms along a mid-ocean ridge and older crust moves away
14. The type of boundary between two plates that move toward each other
15. The circulation of particles within a material caused by differences in thermal energy and density
16. The dense metallic center of the Earth
18. The rigid outermost layer of the Earth that includes the upper mantle and crust
19. The type of boundary between two plates that slide past one another

1. Name given to a supercontinent that began to break apart 200 million years ago
2. Magma that erupts onto Earth's surface
3. The process that occurs when one tectonic plate moves under another tectonic plate
5. The partially melted portion of the mantle below the lithosphere
6. the rigid slabs of rock that make up the Earth's surface
10. The movement of Earth's continents over time
11. Long, narrow mountain range on the ocean floor
13. The process that results when magma rises and pushes oceanic plates in two different directions
14. The brittle, rocky outer layer of Earth
17. The type of boundary between two plates that move away from each other