Geologic time scale

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Across
  1. 2. A group of organisms that can reprode with each other in nature
  2. 5. A record of the geologic events
  3. 9. The whole series of pasr events conected with someone or something
  4. 10. Evidence from ocean floor
  5. 11. The present into three long units of life
  6. 12. Material to prove something
Down
  1. 1. Eras are subdivided into units of geologic time
  2. 3. Long time ago animal traces
  3. 4. A period of one hundred years
  4. 6. Help Identity major events in Earth’s history
  5. 7. The geologic time scale
  6. 8. Every ten years