Across
- 4. when two plates move away from each other
- 7. a long, deep indentation in the ocean floor formed when two plates move together
- 9. the place where two plates meet
- 11. a sudden shaking of Earth's surface
- 12. something we observe to be similar over and over again
Down
- 1. Earth's outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
- 2. a diagram that shows what the inside of something looks like
- 3. an underwater mountain range formed when two plates move apart
- 5. 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
- 6. the layer of soft, solid rock underneath Earth's plates
- 8. when two plates move toward each other
- 10. one of the very large sections of hard, solid rock that make up Earth's outer layer