Plate Tectonics
Across
- 2. The earth's crust being pushed back into the mantle due to new material forming
- 4. A valley caused by two tectonic plates diverging
- 6. A deep part of the ocean that pulls down the old seafloor into the mantle
- 8. A cycle of liquids where the cold liquid sinks, reheats, and then rises to cool back down.
- 11. A break in the earth's crust that usually results as a center for seismic activity
- 13. A boundary that consists of pulling away from each other
- 14. A pocket of magma that forms under the surface to later form a volcano
- 15. Molten rock (after it reaches surface)
- 17. The movement of liquid in the earth that drives the plates to move
- 19. The major circle of volcanoes around the Pacific Ocean
- 20. A massive chunk of the earths crust that are moved by convection currents
- 21. A natural event that occurs when two plates collide
- 22. Molten rock (below the surface)
Down
- 1. The idea that says that all continents are slowly moving back together
- 3. A string of islands formed by convergent boundaries
- 5. The process of the seafloor being replaced by a new layer
- 7. A split in the sea floor that forms between two plates. They push out new material constantly and are the reason sea floor spreading occurs
- 9. A boundary that consists of pushing together
- 10. A pattern of magnetic fields in strips of rock
- 12. A mountain that forms when magma reaches the su
- 16. A boundary that consists of sliding against each other horizontally
- 18. A preserved piece of bone or plant encased in rock or clay
- 20. A supercontinent originally thought of by Alfred Wegener