Across
- 3. something we observe to be similar over and over again
- 4. sets of interacting parts
- 5. hot liquid rock below the surface of earth
- 8. a long deep hole on the ocean floor
- 9. pushing out of something suddenly
- 13. how often or fast something goes
- 14. earths main area of land
- 16. to examine in detail
- 17. moving towards the same place
- 18. the outside layer of something
- 19. red hot liquid
Down
- 1. a natural hot spring coming out of the ground
- 2. moving apart in different directions
- 6. the layer of soft liquid rock underneath earths plates
- 7. an extinct animal that lived about 300 million years ago
- 9. sudden ground shaking
- 10. one of the very large sections of inside earth that causes earthquakes
- 11. a picture of old living things on a rock
- 12. a feature that forms on a surface of a planet
- 15. an object, digram, or computer program that helps us understand the world