Plate Motion

3. an object, diagram, or computer program that helps us understand something
4. an extinct reptile that lived about 300 million years ago
9. thinking about what you learned
13. boundary: the place where two plates meet
14. how often or fast something happens
15. a set of interacting parts forming a complex whole
16. the outside or top layer of something
17. the slow pulling apart of land that is caused by plate movement
18. one of the very large sections of hard, solid rock that make up Earth’s outer layer
19. a long, deep indentation in the ocean floor formed when two plates move together

1. any of the many processes (such as eruptions and lava flows) in which gas, lava, ash are pushed out on the surface of Earth
2. a diagram that shows what the inside of something looks like
5. Earth’s outermost layer of hard, solid rock
6. a metric unit of length equal to 1,000 meters
7. an underwater mountain range formed when two plates move apart
8. a scientist who made a claim that the continents fit together like a puzzle
10. your science teacher
11. hot liquid rock below the surface of Earth
12. something we observe to be similar over and over again