Across
- 3. a long, deep indentation in the ocean floor formed when two plates move together
- 5. moving toward the same place
- 7. an extinct reptile that lived about 300 million years ago
- 10. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 12. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
- 14. any of Earth’s main continuous areas of land, such as Africa, Asia, and North America
- 16. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
- 17. a set of interacting parts forming a complex whole
- 18. something we observe to be similar over and over again
- 20. Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water
- 23. the slow pulling apart of land that is caused by plate movement
- 24. to examine in detail for a purpose
- 25. hot liquid rock below the surface of Earth
- 26. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
Down
- 1. the sudden pushing out of something, such as lava from a volcano
- 2. hot liquid rock on the surface of Earth
- 4. a diagram that shows what the inside of something looks like
- 6. how often or fast something happens
- 8. 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
- 9. one of the very large sections of hard, solid rock that make up Earth’s outer layer
- 11. an underwater mountain range formed when two plates move apart
- 13. moving apart in different directions
- 15. the place where two plates meet
- 19. a sudden shaking of Earth’s surface
- 21. the layer of soft, solid rock underneath Earth’s plates
- 22. the outside or top layer of something