Plate Tectonics Crossword Puzzle

3. Where two plates crash together, __ are pushed up.
5. A __ valley forms at the place where two continental plates pull apart.
7. The earth's landmasses and oceans sit on top of the tectonic plates.
9. When two tectonic plates move away from each other, the boundary between them is called a __ boundary.
11. Plate tectonics is the study of the movement of earth's __.
13. What lies on top of the asthenosphere?
15. A __ zone is where a continental plate and an oceanic plate collide, forcing the oceanic plate under the less dense continental plate.
19. A __ collision occurs when two continental plates collide, pushing the continental crust up to form mountains.
21. Which type of scientist studies the Earth?
22. Theory explains how _ drifted.

1. Is the layer of the Earth that is soft because it is almost, but not quite melted.
2. When the molten magma meets the material of the lithosphere, it moves across the surface which way?
4. Heat causes the magma to rise up in the __.
6. Volcanoes and earthquakes occur at plate ___ too.
8. What causes plates to move?
10. New Crust is created when the seafloor moves apart. New magma continuously rises up to fill in the space. This process is called __ spreading.
12. The lithosphere is __ and firm.
14. Movement of plates changes the __ of the earth.
16. When two tectonic plates push into each other, the place the two plates meet is called a __ boundary.
17. When two tectonic plates slide past each other horizontally, the boundary between them is called a __ boundary.
18. Geologists believe the Earth's plates move about on the asthenosphere like __ in a pan of hot water.
20. Over __ of years, the plates change in size and shapes.