Across
- 3. the layer of soft, solid rock underneath Earth's plates
- 4. an object, diagram, or computer program that helps us understand something by making it simpler or layer
- 8. a diagram that shows what the inside of something looks like
- 9. something we observe to be similar over and over again
- 11. a sudden shaking of Earth's surface
- 14. hot liquid rock on the surface of Earth
- 15. moving toward the same place
- 16. hot liquid rock below the surface of Earth
- 17. moving apart in different directions
- 19. that forms on the su
- 20. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
Down
- 1. ridge an underwater mountain range formed when two plates move apart
- 2. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground d
- 5. evidence of life from the past, such as fossilized bones,
- 6. an extinct reptile that lived about 300 million years ago
- 7. any of Earth's main continuous areas of land, such as Africa
- 10. Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
- 12. to examine in detail for a purpose
- 13. how often or fast something happens
- 18. the sudden pushing out of something, such as lava from a volcano