Unit 1 Science Vocabulary Review

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