Geologic Time Scale

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Across
  1. 2. Exact age of rock layers and fossils
  2. 5. current era
  3. 6. newer rocks are on top of older rocks
  4. 8. life on earth started
  5. 9. chaotic conditions on earth
  6. 10. states that if a layers cuts across a layer it must be younger than the layer it cuts into
Down
  1. 1. dinosaur era
  2. 3. when rocks and plates formed
  3. 4. left over traces of organisms
  4. 7. General time of when rock layers were formed