how earth & its climate has changed

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Across
  1. 2. continental drift caused this land mass
  2. 6. one of the many ways humans create greenhouse gases
  3. 7. lots of greenhouse-gases cause this phenomenon that warms up the earth
  4. 9. remains or impressions of plants and animals
  5. 10. a massive cause of greenhouse gases
Down
  1. 1. an event from the geological time scale that killed almost all plant and animals
  2. 3. a cause of a mass extinction event
  3. 4. the second time period of the mesozoic
  4. 5. a greenhouse-gas commonly produced by cattle
  5. 8. cold time period