Climate Change

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Across
  1. 4. A warming of the lower atmosphere caused by certain gases
  2. 5. Plate tectonics and volcanic eruptions are _______.
  3. 10. Coal, oil and natural gas are
  4. 11. This greenhouse gas comes from cows
  5. 12. Low amounts of carbon dioxide in the atmosphere can cause cooling events called
  6. 13. Carbon dioxide and water vapor are ___________.
  7. 14. Since 1880 Earth's temperature and carbon dioxide levels have been
Down
  1. 1. These come from Antarctica and look like glass rods and contain air bubbles.
  2. 2. Humans eat too much ______ like cows, pigs and chickens.
  3. 3. Global warming is caused by ____ _____ such as burning fossil fuels and cutting down trees
  4. 6. Scientists learn about Earth's past climates through tree rings, ice cores and
  5. 7. This is a sudden or gradual change in Earth’s climate.
  6. 8. Large __________ eruptions can either or warm Earth
  7. 9. The increase in Earth's average temperature