Across
- 3. one effect of global warming
- 6. biggest reason for increase in greenhouse gases
- 10. essential for live to exist on the earth
- 11. attacked the ozone layer causing it to thin
- 13. vapor decreases with altitude
- 14. occurs when ice caps melt and sea levels rise
- 17. gases that are in the earths atmosphere
- 19. emitted from agricultural and industrial activities
- 21. lowest percentage of atmospheric gases
- 22. hottest temperature
- 24. ozone layer is here
- 25. coldest temperature
Down
- 1. decreases with altitude
- 2. a natural process that warms the earths surface
- 4. human activity that causes global warming
- 5. not a greenhouse gas
- 7. comes from the burning of fossil fuels
- 8. where all of the gases that were in the early atmosphere came from(sulfur, methane, and carbon dioxide)
- 9. warming earths air drastically heating up
- 12. a layer of the atmosphere
- 15. protects the earth from harmful UV rays
- 16. emitted during the production and transport of coal, natural gas, and oil
- 18. most weather and water
- 20. most abundant gas
- 23. where one layer ends and another begins