Earth History- Geology Time

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Across
  1. 1. / Was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
  2. 5. / The largest mass extinction.
  3. 6. / Also known as North Asia.
  4. 8. / The sudden occurrence of a violent discharge of steam and volcanic material.
  5. 10. / Where a huge meteorite smashed earth into.
  6. 11. / The second largest mass extinction.
  7. 12. / The time span that lies between the secondary period and the quaternary.
Down
  1. 2. / An important trace gas in Earth's atmosphere.
  2. 3. / A sudden catastrophic event during which a significant period.
  3. 4. / minute particles suspended in the atmosphere which can either be natural or artificial.
  4. 7. / The solid mineral material forming part of the surface of the earth, exposed on the surface or underlying the soil or oceans.
  5. 9. / involving or causing sudden great damage or suffering.