Plate Tectonic Movement

3. The strength of an earthquake is called the...
4. the idea that earths continents move, and were once joined together.
5. the boundary between two plates.
9. Who proposed continental drift?
11. The theory on how the earths plates move.
12. when one plate goes under the other
14. an opening in the earths crusts that allows magma to escape.
17. a preserved remain of a once living organism.
18. Has an upper layer and lower layer, called the lithosphere and the asthenosphere.
19. The very center of the earth, and has an outer layer and an inner layer.
20. the super continent 200 million years ago.

1. The way two plates move towards or past each other.
2. The outer shell divided into pieces that slowly move around.
4. A thin layer of rock around the earth.
5. the idea that the earths continents ere always joined together.
6. two plates slide past each other.
7. earthquakes are recorded by...
8. The shaking of the earth when two plates release stored energy along a fault.
10. divergent boundaries form these in the ocean.
13. two plates collide with each other.
15. Two plates move apart.
16. A long hole in the ground that is deeper than it is wide.
18. A steep elevated land form caused by convergent boundaries.