Plate Motion 1

2. the slow pulling apart of land that is caused by plate movement
4. section: a diagram that shows what the inside of something looks like
7. the layer of soft, solid rock underneath Earth’s plates
8. a set of interacting parts forming a complex whole
10. one of the very large sections of hard, solid rock that make up Earth’s outer layer
11. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
13. moving apart in different directions
15. how often or fast something happens
17. hot liquid rock below the surface of Earth magma: roca líquida y caliente bajo la superficie de la Tierra
18. layer Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
20. to examine in detail for a purpose
21. the sudden pushing out of something, such as lava from a volcano
23. ridge an underwater mountain range formed when two plates move apart

1. an extinct reptile that lived about 300 million years ago
3. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
4. any of Earth’s main continuous areas of land, such as Africa, Asia, and North America convergent: moving toward the same place
5. the outside or top layer of something
6. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
9. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
12. hot liquid rock on the surface of Earth
14. a sudden shaking of Earth’s surface
16. something we observe to be similar over and over again
19. boundary the place where two plates meet
22. a long, deep indentation in the ocean floor formed when two plates move together volcanic 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 Earth