Plate Motion

2. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
6. moving toward the same place
8. an extinct reptile that lived about 300 million years ago
11. the layer of soft, solid rock underneath Earth’s plates
14. ridge an underwater mountain range formed when two plates move apart
15. moving apart in different directions
17. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
18. to examine in detail for a purpose
19. one of the very large sections of hard, solid rock that make up Earth’s outer layer
20. something we observe to be similar over a
22. a long, deep indentation in the ocean floor formed when two plates move together

1. the outside or top layer of something
3. a sudden shaking of Earth’s surface
4. how often or fast something happens
5. hot liquid rock on the surface of the Earth
7. the sudden pushing out of something, such as lava from a volcano
9. layer Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
10. the slow pulling apart of land that is caused by plate movement
11. hot liquid rock below the surface of the Earth
12. boundary the place where two plates meet
13. any of Earth’s main continuous areas of land, such as Africa, Asia, and North America
16. activity any of the many processes (such as eruptions and lava flows) in which gas, lava, and ash are pushed out on the surface of the Earth
21. section: a diagram that shows what the inside of something looks like