Across
- 3. Lowest layer of atmosphere
- 6. Causing global average temperature to rise
- 7. A method by which a planet gains atmosphere
- 12. Gases that are good at absorbing infrared radiation
- 13. Unit of atmospheric pressure
- 14. Greenhouse gas emitted by cows
- 15. Heated by UV light
- 17. Layer of atmosphere where molecules can escape into space
- 18. Greenhouse gas
- 19. Long term trends in weather
- 20. Day to day temperature, pressure, clouds, etc.
- 21. Greenhouse gas
Down
- 1. When this happens, CO2 level build up and the planet warms
- 2. Frozen CO2
- 4. Happened to the atmosphere of Venus
- 5. Charged particle belts encircling Earth
- 8. These beautiful lights occur mostly near the north pole
- 9. Between the stratosphere and exosphere
- 10. Layer of gas surrounding a planet
- 11. Protective bubble surrounding Earth
- 16. Part of the thermosphere that contains ionized gas