Across
- 4. when two plates slide past each other
- 6. the largest measurement of time
- 7. the preserved remains of an organism
- 9. when the faults halves move away from each other
- 12. when scientists measure the levels of an isotopic element in an object
- 13. The large supercontinent that was made up of all our contienets
- 14. The theory that all the continents used to be together
- 15. the area with active volcanoes being common,
- 18. footprints, claw marks
- 20. the principle that states that the newer rock layers will be on the top
Down
- 1. when halves of a fault move towards each other
- 2. when the faults halves slide past each other
- 3. happens in the asthenosphere below the surface
- 5. every fossil we have discovered
- 8. when two plates move towards one another
- 10. old seafloor in destroyed in a
- 11. seafloor spreading begins at
- 16. an animal that appeared for a short time but was widespread
- 17. WHen two plates move away from each other
- 19. the time scale that is smaller that periods era and eons