B2 2020 Kalra

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Across
  1. 3. layer with weather & clouds
  2. 7. burning of these results in dangerous chemicals being released into the atmosphere
  3. 8. protects us from UV radiation
  4. 10. removal of trees
  5. 13. chemical formula is CH4
  6. 14. outermost layer of the atmosphere
  7. 15. most abundant gas in the atmosphere
  8. 16. result of the greenhouse effect
  9. 18. protects our Earth from harmful UV radiation and asteriods/meteors; essential for life on Earth
  10. 20. the biggest cause of the greenhouse effect is what?
  11. 21. troposphere is the (lightest/densest) layer
  12. 22. the 3rd most abundant gas in the atmosphere is (argon/helium)
  13. 24. the (jet stream/weather) causes turbulence in the stratosphere
Down
  1. 1. heat from Sun gets trapped in Earth's atmosphere and heats up the planet
  2. 2. released through burning of fossil fuels
  3. 4. 2nd most abundant gas in atmosphere
  4. 5. the atmosphere is never ends, so it is ____.
  5. 6. without the atmosphere, Earth would be very _ _ _ _.
  6. 9. layer containing ozone layer
  7. 10. in the troposphere, the temp. (decreases/increases) with altitude
  8. 11. layer where Northern Lights take place
  9. 12. a (population increase/population decrease/population staying constant) has resulted in more fossil fuels and dangerous gases being released
  10. 17. hole opened in the ozone layer above which continent?
  11. 19. layer where meteors burn up
  12. 23. banned chemical that has 11,000x the heat capacity of CO2