Across
- 1. A break in the earth's crust.
- 4. A weak spot in the crust where magma has come to the surface.
- 5. a layer of molten (melted) iron and nickel that surrounds the inner core
- 10. A tectonic plate boundary where two plates collide, come together, or crash into each other.
- 12. A plate boundary where two plates move away from each other.
- 14. the soft layer of the mantle, on which the lithosphere floats
- 16. A major belt of volcanoes that rims the Pacific Ocean
- 17. the thin layer of rock that forms Earth's outer surface
Down
- 2. A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle that moves due to convection currents.
- 3. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
- 6. A plate boundary where two plates move past each other in opposite directions.
- 7. The name of the single landmass (supercontinent) that broke apart 200 million years ago and gave rise to today's continents.
- 8. the layer of hot rock (solid material) between the crust and the core
- 9. A trace of an ancient organism that has been preserved in rock.
- 11. a dense sphere of solid iron and nickel at the center of the Earth
- 13. The shaking that results from the movement of rock beneath Earth's surface.
- 15. a rigid layer made up of the upper part of the mantle and the crust