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chapter 3
chapter 3 learn for brain
| Term | Definition |
|---|---|
| weather | The condition of Earth's atmosphere at a particular time and place. (p. 74) |
| atmosphere | The envelope of gases that surrounds Earth. (P. 74) |
| water vapor | Water in the form of a gas. (p. 76) |
| density | The ratio of the mass of a substance to its volume (mass divided by volume). (p. 79) |
| air pressure | The pressure caused by the weight of a column of air pushing down on an area. (p. 79) |
| barometer | An instrument used to measure changes in air pressure. (p. 80) |
| altitude | Elevation above sea level. (p. 82) |
| troposphere | The lowest layer of Earth's atmosphere. (p. 86) |
| stratosphere | The second-lowest layer of Earth's atmosphere. (p. 87) |
| mesosphere | The layer of Earth's atmosphere immediately above the stratosphere. (p. 88) |
| thermosphere | The outermost layer of Earth's atmosphere. (p. 89) |
| ionosphere | The lower part of the thermosphere. (p. 89) |
| exosphere | The outer layer of the thermosphere. (p. 89) |
| radiation | The transfer of energy by electromagnetic waves. (p. 91) |
| scattering | Reflection of light in all directions. (p. 93) |
| greenhouse effect | The trapping of heat near a planet's surface by certain gases in the planet's atmosphere. (p. 95) |
| heat | The transfer of thermal energy from one object to another because of a difference in temperature. (p. 98) |
| wind | The horizontal movement of air from an area of high pressure to an area of lower pressure. (p. 101) |