Plate Tectonic Boundaries

3. - A long narrow hilltop, mountain range, or watershed.
5. - The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
7. - A super-continent that incorporated almost all the landmasses on Earth.
8. - To lift up
10. - A theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates.
12. - Caused by tectonic plates in the Earth's lithosphere moving apart.
13. - large-scale horizontal movements of continents relative to one another and to the ocean basins during one or more episodes of geologic time.
16. - A geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other.
18. - Plates Move toward each other.
19. - Boundary between two tectonic plates, where the plates are moving horizontally or vertically in opposite directions.

1. - Plates slide against each other.
2. - Sinking of the ground because of underground material movement.
4. - Plates mover Away from each other.
6. - A place where there is a long break in the rock that forms the surface of the earth.
9. - The outermost shell.
11. - The upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
14. - A long, narrow ditch.
15. - Contains Lava
17. - The rigid outer part of the earth, consisting of the crust and upper mantle.