Plate tectonics

3. a type of plate boundary where the plates slowly move apart from each other.
4. a type of fault where the crust moves sideway past each other.
6. the process in which the crust pushes downward into the mantle at a fault line.
9. slip A type of plate boundary where the plates move horizontally past each other.
11. oceanbottom mountain ranges split down the middle by a deep crack.
13. the uppermost solid part of earth's crust.
15. currents circulatory patterns of heat in the magma believed to be the driving force behind plate movement.

1. A type of plate boundary where the plates slowly collide into each other.
2. The branch of geology that deals with the movement that shapes the earth’s crust.
5. Another name for the deep crack splits fault-block mid-ocean ridge mountains.
7. the preserved remains of ancient once-living organisms .
8. V-shaped valleys that are the deepest parts of the oceans where subduction occurs.
10. A large segment of earth's crust that slowly moves.
12. A German scientist who was the first person to build a scientific case to support the theory of continental drift.
14. floor spreading A multi-word term used to describe the movement of oceanic crust at a divergent boundary.