geologic time scale

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Across
  1. 3. rocks that are younger are _____
  2. 4. what is cutting the rocks will be younger than any of the rocks it is cutting
  3. 6. rocks that are older are _____
  4. 7. remains of animals/plants that have hardened over time
  5. 9. the exact age that something is
  6. 10. age but not an exact number
Down
  1. 1. bottom is older, top is younger
  2. 2. a rock encasing another rock will be younger than which it is encasing
  3. 5. a fossil that can be helpful in finding the relative age over a wide area of rock
  4. 8. the time it takes for half an atom to decay