Across
- 1. (C02) a gas produced from burning carbon. Occurs both naturally and can be produced by human activities
- 3. the envelope of gases surrounding the earth or another planet.
- 5. (CH4)an extremely effective absorber of radiation. Cows emit a lot of this greenhouse gas
- 7. the boundary between spheres
- 10. (o3) ozone layer in the troposphere formed by human interaction
- 11. (CFCs) are non-naturally formed and produced by humans as coolants. Destroy the ozone layer creating holes.
- 12. coldest temperatures in the atmosphere. Temperatures decrease with altitude. Meteorites burn up here.
- 14. produces the most artificial greenhouse gases
- 17. a natural process that heats earth. This process occurs naturally, however human interaction can affect it.
- 19. the pressure exerted by the weight of the atmosphere
Down
- 2. occurs when a planet's atmosphere contains greenhouse gas in an amount sufficient to block thermal radiation from the planet, preventing the planet from cooling and from having liquid water on its surface
- 3. gases in earth’s atmosphere
- 4. gases in earth’s atmosphere that trap heat
- 6. (N20) a greenhouse gas produced by combustion of fossil fuels
- 8. layer of the atmosphere where the weather and the water cycle occur. Highest pressure is at sea level. Temperatures decrease with altitude. Most dense layer of the atmosphere.
- 9. a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms. When these are burned, greenhouse gases are emitted
- 13. layer of the atmosphere where the ozone layer is located. The sun heats this layer. Holes can form in the ozone layer due to chlorofluorocarbons.
- 15. (H20)most abundant gas in the atmosphere
- 16. layer with the hottest temperatures in the atmosphere. Temperature rises with altitude. Gamma rays and x rays are absorbed here. Lowest pressure in the atmosphere. Aurora borealis occurs here.
- 18. (CO) a reactive greenhouse gas present in Earth's atmosphere at very low concentrations.