Across
- 3. a rare chemical
- 4. envelope of gases surrounding the earth
- 5. Petroleum
- 7. a black brownish sedimentary rock
- 9. absorb and emit infrared radiation in the wavelength range emitted
- 10. changes made by global warming and green house gasses
- 12. something that was release
- 16. the state of atmosphere at a place
- 17. a type of gas
- 20. power plant
- 21. gaseous phase of water
Down
- 1. known as laughing gas
- 2. long term heating of the earth
- 6. intensity of heat
- 8. the layer of gas covering the earth
- 11. another un common type of gas
- 13. a layer of ice
- 14. the simplest carbon dioxide
- 15. a colorless, odorless gas produced by a colorless, odorless gas produced by burning carbon
- 18. the fall of rain
- 19. the movement of air