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Earth-Atmosphere
| Term | Definition |
|---|---|
| atmosphere | A thin layer of air that forms a protective covering around the planet. |
| troposphere | lowest of Earth's atmosphere. |
| ionosphere | A layer of electrically charged particles. |
| ozone layer | An atmospheric layer. |
| ultraviolet radiation | A type of energy that come to Earth from the sun. |
| chlorofluorocarbon | A chemical compound used in some refrigerators, air conditioners, and aerosol sprays. |