Plate Tectonics

3. A boundary that consists of sliding against each other horizontally
6. Molten rock (after it reaches surface)
7. A massive chunk of the earths crust that are moved by convection currents
8. A cycle of liquids where the cold liquid sinks, reheats, and then rises to cool back down.
12. Molten rock (below the surface)
14. A boundary that consists of pulling away from each other
16. The idea that says that all continents are slowly moving back together
17. The major circle of volcanoes around the Pacific Ocean
18. A mountain that forms when magma reaches the su
20. A pocket of magma that forms under the surface to later form a volcano
21. A natural event that occurs when two plates collide
22. The earth's crust being pushed back into the mantle due to new material forming
23. 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

1. A supercontinent originally thought of by Alfred Wegener
2. A boundary that consists of pushing together
4. A deep part of the ocean that pulls down the old seafloor into the mantle
5. A valley caused by two tectonic plates diverging
9. A string of islands formed by convergent boundaries
10. The movement of liquid in the earth that drives the plates to move
11. A pattern of magnetic fields in strips of rock
13. A break in the earth's crust that usually results as a center for seismic activity
15. The process of the seafloor being replaced by a new layer
19. A preserved piece of bone or plant encased in rock or clay