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