Global Warming/ Climate Change

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Across
  1. 5. contains the gases we breathe and weather
  2. 6. thin layer of gases that surround earth
  3. 11. when earth's overall temperature was lower
  4. 12. largest percentage of gas in our atmosphere
  5. 13. gases that change
  6. 14. layer in atmosphere that absorbs and scatters UV radiation
Down
  1. 1. periods where glaciers retreat
  2. 2. period where Earth's atmosphere was mostly CO2 and nitrogen
  3. 3. when heat energy from sun gets trapped
  4. 4. area between stratosphere and upper troposphere
  5. 7. during these periods glaciers are growing
  6. 8. dry and dense layer of atmosphere
  7. 9. gases that do not change day to day
  8. 10. indirect measurements