Atmosphere

6. Second most abundant gas in the atmosphere
8. Fraction of total radiation reflected by any surface
11. One of three things that can happen to radiation on Earth's surface, this causes object to heat-up
14. Something that can vary temperature from place to place and time to time
15. The most abundant gas in the atmosphere
17. The motion of the Earth around the sun.
18. Decreases with altitude because air thins-out
19. The only mechanism that does not need particles to transfer heat
20. The motion of the Earth on its axis.
21. The layer of Earth's atmosphere that contains most of the air
22. The layer of Earth's atmosphere containing the ozone layer

1. The material or layer responsible for absorbing most UV radiation
2. Overall increase in greenhouse gases leading to an increase in global temperatures
3. The coldest layer of Earth's atmosphere
4. The final layer of Earth's atmosphere
5. Greenhouse gas that stays in the atmosphere for 12 years
7. Particles in the atmosphere responsible for trapping Earth's heat
9. The location and _____ of the Earth cause the seasons
10. One of three greenhouse gases holding in Earth's heat
12. When heat is transferred through currents in liquids and gases
13. The mechanism in which physical contact is needed to transfer heat
14. The hottest layer of the atmosphere
16. Clouds are able to _________ radiation, which allows us to still see on cloudy days