2 2020 Meadows

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Across
  1. 3. number of earths atmospheric layers
  2. 5. most abundant gas in the atmosphere
  3. 7. what humans are doing to affect the environment
  4. 9. layer home to earths ozone layer
  5. 14. it is a colourless non-flammable gas
  6. 15. humans destroying indispensable resources
  7. 16. substance without a fixed shape
  8. 17. set of layers of gases surrounding a planet
  9. 18. one object heating another by touching
  10. 19. Earth's atmosphere trap the Sun's heat
  11. 21. transfer of heat through a fluid
  12. 22. the sun uses this to warm the earth
Down
  1. 1. driven by human emissions of greenhouse gases
  2. 2. layer where it gets colder as altitude increases
  3. 4. this layer contains 99% of earths water vapor
  4. 6. there are five of these in the atmosphere
  5. 8. permanent removal of trees to make room for something besides forest
  6. 10. the gaseous state of water
  7. 11. this layer temperature increases with altitude
  8. 12. makes up 21% of the atmosphere gases
  9. 13. makes up point 04 of atmospheric gases
  10. 19. unnatural heating of the earth do to humans
  11. 20. the highest layer of earths atmosphere