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