Across
- 2. rocks formed from sediments in layers
- 3. rocks melt and turn into this
- 6. description that tells older rocks are under younger rocks
- 10. explanation in science backed by a lot of research
- 11. anything dealing with the earth is a part of it
- 12. the continuous path that rocks go through for years and years
- 13. all of the gases and air
- 18. when an unstable isotope breaks down into a stable isotope
- 20. the hardest known mineral
- 21. the layer of the earth we stand on
Down
- 1. warm air rising and cool air falling
- 3. rocks formed from intense heat and pressure
- 4. the hottest layer of the earth
- 5. all living things
- 7. the supercontinent
- 8. the only liquid layer of the earth
- 9. all water falls under this
- 14. the thickest layer of the earth
- 15. the time it takes half of the radiation to go
- 16. found in sedimentary rocks that can tell of past
- 17. a statement about a natural phenomenon
- 19. rocks formed from cooling of lava