Across
- 2. The amount of matter in an object or sample.
- 4. Gasses that don't react easily with other substances.
- 7. Gasses in the atmosphere for which their relative amounts stay constant.
- 9. Atmospheric gasses whose amounts change based on the environment.
- 11. Gasses that absorb and radiate energy in the atmosphere trapping thermal energy.
- 12. A form of oxygen that forms a thin layer in the atmosphere. The chemical formula for this is O3.
- 13. A colorless odorless gas that makes up about 78 percent of Earth's atmosphere. The chemical formula for this is N2.
- 14. A greenhouse gas in Earth's atmosphere that is created by natural and human made processes. The chemical formula for this is CO2.
Down
- 1. A process used by plants and algae to make sugar (food) out of light, carbon dioxide, and water.
- 3. A variable gas in the atmosphere; a greenhouse gas.
- 5. Radiant energy that heats.
- 6. The gaseous state of water; a variable gas that is found in Earth's atmosphere. The chemical formula for this is H2O.
- 8. The mixture of gasses surrounding Earth.
- 10. The layer of gasses surrounding Earth. It's layers include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
- 15. A gas that makes up about 21 precent of Earth's atmosphere. The chemical formula for this is O2.