Plate Motion

1. how often or fast something happens
4. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
5. hot liquid rock below the surface of Earth
6. Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
10. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
13. an extinct reptile that lived about 300 million years ago
14. one of the very large sections of hard, solid rock that make up Earth’s outer layer
16. moving apart in different directions
19. a diagram that shows what the inside of something looks like
20. a sudden shaking of Earth’s surface
21. a long, deep indentation in the ocean floor formed when two plates move together
22. something we observe to be similar over and over again

2. to examine in detail for a purpose
3. moving toward the same place
7. the outside or top layer of something
8. the sudden pushing out of something, such as lava from a volcano
9. the place where two plates meet
11. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
12. a set of interacting parts forming a complex whole
13. the layer of soft, solid rock underneath Earth’s plates
15. any of Earth’s main continuous areas of land, such as Africa, Asia, and North America
17. the slow pulling apart of land that is caused by plate movement
18. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground