Geological Crosswords

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Across
  1. 1. Larger than a Epoch
  2. 2. Era we live in
  3. 3. The Eon we live in
  4. 5. Era Period, Oxygen build-up on Earth. First multi-cellular life.
  5. 9. Period we live in
  6. 10. Longest division of geological time
  7. 12. Australopithecus appears. First sheep, cattle, modern whales, bears, mice, rats, apes, monkeys, dogs, modern birds appear.
  8. 16. First insects, vascular plants on land
  9. 17. period Period from 190 million to 135 million years ago; dinosaurs; conifers
Down
  1. 1. First deer, cats, pigs, tapirs, and rhinos, elephants, horses, owls, shrews, hedgehogs, and rabbits evolve.
  2. 4. approximately the last 63 million years
  3. 6. Period from 544 million to about 500 million years ago; marine invertebrates
  4. 7. Oldest Era
  5. 8. period Period from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
  6. 11. First eon
  7. 13. Smallest division of geological time
  8. 14. Larger than a Period
  9. 15. First mammals, dinosaurs, frogs, turtles, crocodyloformes