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