Geologic Time

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Across
  1. 2. The predictable time an element takes to decay
  2. 4. A break in the Earth's surface
  3. 7. The law that states that the layer that is cut is older than the rock that it cuts through
  4. 8. The age of a rock compared to other layers
  5. 9. A fossil used to find the relative age of a rock
  6. 10. The exact age of a rock
Down
  1. 1. The law that states that any rock fragment that is included in a rock must be older than the rock they are included in
  2. 3. The study of fossils
  3. 5. The law that states that older rock is underneath younger rocks
  4. 6. The study of the Earth's surface