The Land

3. features on the Earth's surface that make up the terrain
4. a seafloor mountain system formed by plate tectonics
8. what happens when two blocks of the earth suddenly slip past one another
9. the innermost layer of the earth
10. biggest layer of earth, in between outer core and crust
12. wearing away
14. a process that involves the movement of energy from one place to another
17. molten rock found below the earth's surface
18. fast moving current of hot gas and volcanic matter
20. volcanoes that have not erupted in a long time but are expected to erupt again in the future

1. where new crust is generated as the plates pull away from each other
2. a supercontinent that incorporated almost all the landmasses on earth
5. the layer in between inner core and mantle
6. a large landmass, sometimes referred to as a supercontinent
7. major fracture of the Earth's crust in extreme western north america
11. a breaking down or dissolving of rocks and minerals on the earth's surface
13. smallest layer, outermost layer
15. opening or vents where lava, tephra, and steam erupt onto the Earth's surface
16. the first person to formulate a complete statement of the continental drift hypothesis
19. mixture of water and rock fragments that flow quickly down the slopes of a volcano