Across
- 3. A colorless toxic gas with a smelly odor.
- 4. Internal energy of a system.
- 5. Water that is in the form of a vapor, or gas.
- 10. An odorless gas that's made by burning carbon.
- 11. A gas that's far below room temperature.
- 13. It forms about 21% of the atmosphere.
- 14. A chemical that makes up 78% of earths atmosphere.
- 15. These gases are the most stable because of the outer shell.
Down
- 1. A process plants use to make food.
- 2. A greenhouse gas made out of cow farts.
- 6. A measurement of resistance.
- 7. Invisible substance surrounding the earth.
- 8. Layer of gases that surrounds planets or stars.
- 9. A gas that obsorbs and admits radiated energy.
- 12. An atmospheric gas whose amount changes based on the enviremont.