Plate Motion

3. how often or fast something happens
6. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
7. the outside or top layer of something
9. to examine in detail for a purpose
10. any of Earth's main continuous areas of land, such as Africa, Asia, and North America.
13. the slow pulling apart of land that is caused by plate movement
14. hot liquid rock below the surface of Earth
15. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
16. a set of interacting parts forming a complex whole

1. something we observe to be similar over and over again
2. a feature that forms on the surface of a planet,such as a mountain, channel,or sand dune
4. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
5. hot liquid rock on the surface of Earth
8. a sudden shaking of Earth's surface
11. a long, deep indentation in the ocean floor formed when two plates move together
12. moving apart in different directions