Geologic Time Crossword

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Across
  1. 3. /Creatures that dominated the world during the Mesozoic Era
  2. 5. /The Headen, Proterozoic eons, and Archean together
  3. 7. /A major division of geological time
  4. 8. /Began 540 million years ago as the supercontinent Pannotia was breaking up
Down
  1. 1. /Divides Earth's history into intervals of time defined by major events or changes on Earth
  2. 2. /Major division of geological time, a subdivision of an eon
  3. 4. /The new continent that formed during the Paleozoic Era
  4. 6. /Began 248 million years ago after a mass extinction