climate change brayden taylor

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Across
  1. 1. when coral dies and turns white
  2. 3. has a much thinner atmosphere, with no greenhouse effect.
  3. 9. Period 4.6 billion to 540 million years ago, the Earth’s atmosphere was mostly carbon dioxide and nitrogen.
  4. 10. contains air we breathe and where weather is
  5. 12. weakened the greenhouse effect due to the removal of carbon dioxide and oxidation of methane.
  6. 13. earths overall temp drops
  7. 14. frozen seawater that floats on the ocean’s surface.
Down
  1. 2. thin layer of gases that surround the earth
  2. 4. cylinders of ice drilled from ice sheets and glaciers.
  3. 5. period that ended 10-20 thousand years ago
  4. 6. darker areas on the sun’s surface created by intense magnetic fields.
  5. 7. permanent layers of ice covering a tract of land, especially in the polar regions.
  6. 8. an element that takes the solid form of either graphite or diamond.
  7. 11. period of cooling that lasted from the 16th-19th centuries.