Geologic Time Scale

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Across
  1. 3. Single celled organisms have been producing this for 2 billion years in this era.
  2. 6. The era that covers 90% of Earth's history.
  3. 8. This era is characterized as the age of dinosaurs.
  4. 9. water vapour cooled and condensed to form this.
  5. 10. The mesozoic era was known as the 'Age of _____________'.
  6. 12. These continue to push land masses across the Earth's surface.
Down
  1. 1. 95% of all life on earth died.
  2. 2. Several of these mass _____________ happened during this era.
  3. 4. Swamps and forests were able to form because of this.
  4. 5. This super continent that is breaking up into the continents we now know.
  5. 7. Life only existed in or near this during the Paleozoic era.
  6. 11. This era lasted about 325 million years.