Plate Motion

3. the layer of soft, solid rock underneath Earth's plates
5. one of the very large sections of hard, solid rock that make up Earth's outer layer
7. how often or fast something happens
9. to examine in detail for a purpose
10. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
12. the outside or top layer of something
15. moving toward the same place
17. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
18. an extinct reptile that lived about 300 million years ago
19. hot liquid rock below the surface of the Earth
21. something we observe to be similar over and over again
23. moving apart in different directions
24. Earth's outermost layer of hard, solid rock that is underneath the soil, vegetation, and water

1. a sudden shaking of earth's surface
2. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
4. the place where two plates meet
6. hot liquid rock on the surface of the Earth
8. an underwater mountain range formed when two plates move apart
11. a diagram that shows what the inside of something looks like
13. the sudden pushing out of something, such as lava from a volcano
14. any of Earth's main continuous areas of land, such as Africa, Asia, and North America
16. any of the many processes (such as eruptions and lava flows) in which gas, lava, and ash are pushed out on the surface of Earth
20. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
22. a long, deep indentation in the ocean floor formed when two plates move together