Plate Motion

2. the place where two plates meet
5. Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
9. a diagram that shows what the inside of something looks like
11. the sudden pushing out of something, such as lava from a volcano
13. to examine in detail for a purpose
14. how often or fast something happens
15. a sudden shaking of Earth’s surface
17. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
19. an extinct reptile that lived about 300 million years ago
20. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see

1. any of Earth’s main continuous areas of land, such as Africa, Asia, and North America
3. moving apart in different directions
4. the outside or top layer of something
6. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
7. moving toward the same place
8. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
10. one of the very large sections of hard, solid rock that make up Earth’s outer layer
12. something we observe to be similar over and over again
16. hot liquid rock below the surface of Earth
17. hot liquid rock on the surface of Eart
18. a set of interacting parts forming a complex whole