PLATE MOTION

3. something we observe to be similar over and over again
4. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
7. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
10. moving apart in different directions
11. a sudden shaking of Earth's surface
12. how often or fast something happens

1. an extinct reptile that lived about 300 million years ago
2. moving toward the same place
5. the layer of soft, solid rock underneath Earth's plates
6. one of the very large sections of hard, solid rock that make up Earth’s outer layer
8. the outside or top layer of something
9. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see