Across
- 2. Thin, dense lithospheric plates
- 4. Molten rock that is beneath the earths surface
- 5. Theory on how the pieces of the earth's surface move
- 8. A break in the earth's crust
- 10. Lower layer of the mantle
- 12. Molten rock the erupts from volcanoes
- 14. Lithospheric plate sinking into the mantle
- 16. Boundary where two plates come together
- 17. Where most earthquakes and volcanoes happen
- 18. Layer of earth under the crust
- 19. Supercontinent
Down
- 1. Thick, less dense lithospheric plates
- 3. Movements within the earth's surface
- 4. Long chains of undersea mountains
- 6. Top layer of the mantle
- 7. Boundary where two plates move apart
- 9. A vent in the earths surface where magma and gases erupt
- 11. Boundary where two plates slide by each other
- 13. Cooled lava
- 15. Valley in the ocean created where one lithospheric plate suducts another