Across
- 3. Side by side dragging force at a transform plate
- 8. Plastic layer within the mantle
- 10. Eons are subdivided into smaller units of time
- 14. Largest continent made up of all Earth's present day landmasses
- 16. Sediment turns into rock
- 17. Two plates move apart from each other
- 18. Brittle rocky outer layer of Earth
- 19. life Time required for half of the parent isotope to decay into daughter isotopes
- 20. The longest unit of geologic time
Down
- 1. drift Continents are in constant motion
- 2. Atoms of the same element have different numbers of neutrons
- 4. The shortest unit of geologic time
- 5. The pulling force at a divergent boundary
- 6. The process of restoring land disturbed by mining
- 7. Matching rockas and fossils from different locations
- 9. decay Process by which an unstable element naturally changes into another element that is stable
- 11. Earth's crust is broken into rigid plates
- 12. Eras are subdivided into
- 13. Oldest rocks are on the bottom
- 15. Removal of large areas of forests