Climate change crossword

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Across
  1. 2. shape of orbit around the sun, tilt of earth axis, wobbling of earth axis
  2. 4. when Carbon dioxide levels are the highest
  3. 5. the earth was mostly carbon dioxide and nitrogen
  4. 7. glaciers growing and advancing
  5. 9. very dry and less dense than the troposphere
  6. 11. under water current fueled by the mixing of warm and cold salt water
  7. 12. located on land
  8. 13. when carbon dioxide levels are the lowest
  9. 14. located in the ocean
  10. 15. increasing due to melting ice
  11. 17. when a hemisphere is facing the sun half of the incoming solar radiation passes through the atmosphere
Down
  1. 1. water expands as it warms
  2. 3. contains the air we breathe and every aspect of what we call weather
  3. 6. thin layer of gas that surrounds the earth
  4. 8. proxy that is used to measure the past atmosphere of earth
  5. 10. releases sulfur dioxide and particulates that scatter solar radiation
  6. 16. surface temperature is lowered so glaciers form