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Autumn Science 6.7
Earth's Atmosphere
| Term | Definition |
|---|---|
| Air mass | A huge body of air that has similar temperature, pressure, humidity throughout. |
| Air pressure | A force this is the result of the weight of a column of air pushing down on an area. |
| Altitude | Elevation above sea level. |
| Atmosphere | The mixture of gases that surround Earth. |
| Condensation | The process by which a gas, such as water vapor, changes to a liquid such as water. |
| Density | The amount of mass in a given space. |
| Dew point | The temperature at which condensation begins. |
| Evaporation | The process by which molecules at the surface of a liquid, such as water, absorb enough energy to change into a gaseous state, such as water vapor. |
| Front | The area where air masses meet and do not mix. |
| Humidity | A measure of amount of water vapor in the air. |
| Hurricane | A tropical storm that has wind of 119 kilometres per hour or higher; typically about 6000 kilometres across. |
| Mass | A measure of how much matter is in a object. |
| Precipitation | Forms when water such as rain, thunder, and lightning. |
| Thunderstorm | A small, intense weather system that produces winds, rain, thunder, and lightning. |
| Wind | The horizontal movement of air from an area of high pressure to and area of lower pressure |
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