Across
- 5. A fundamental element in all life forms, also a greenhouse gas
- 9. The layer of gases surrounding Earth
- 11. The layer above the stratosphere
- 12. The tilt of Earth's axis
- 13. The average atmospheric conditions in an area over time
- 16. The lowest layer of Earth’s atmosphere, where weather occurs
- 18. The path of Earth around the Sun
- 19. The wobble of Earth's rotational axis
- 20. Relating to the movement of water
Down
- 1. The state of the atmosphere at a specific time
- 2. The layer of the atmosphere where the ozone layer exists
- 3. A climate pattern causing warm ocean temperatures in the Pacific
- 4. A major component of the Earth's atmosphere
- 6. A period of time when glaciers covered large parts of the Earth
- 7. A climate pattern causing cool ocean temperatures in the Pacific
- 8. A key nutrient for plants, often found in fertilizers
- 10. Release of gases into the atmosphere
- 14. A potent greenhouse gas produced by agriculture and landfills
- 15. Traps heat in the atmosphere
- 17. The shape of Earth's orbit around the Sun
