Ellie Morrow

3. the lateral movement of continents resulting from the motion of crustal plates
4. landmass that existed when all continents were joined about 300 to 200 million years ago
5. the thickest layer of the earth and the solid bulk of earth's interior
7. a fluid layer of the earth composed of iron and nickel, that lies above Earth's inner core
8. dense, fast-moving flow of lava, volcanic ash, and hot gases
11. the process that causes exposed rock to decompose
14. waves of shaking that radiate outwards from the earthquake source
15. the process by which the surface of the earth is worn away
16. the molten, fluid rock that comes from a volcano
17. the most extensive chain of mountains on earth
18. the outside layer of the earth
19. heat-driven cycles that occur in the air, ocean, and mantle

1. molten rock in the ground
2. earth's subterranean movements that explain how the major landforms are created
3. the main landmasses of the globe
6. a landslide of wet volcanic debris on the side of a volcano
9. a specific geomorphic feature on the surface of the earth
10. inner most layer of the earth
12. when a volcano is temporarily inactive
13. a mountain that has lava expelled through a cup-like crater at the summit