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Weather and Cloud
| Term | Definition |
|---|---|
| Cumulus | puffy with flat bottoms and round tops that signal fair weather |
| Cirrus | wispy, feathery clouds made of ice crystals that form at high levels |
| Stratus | clouds that form in flat layers and often cover much of the sky |
| Nimbus | a rain cloud |
| Fog | a stratus cloud that forms when air is cooled to its dew point near the ground |
| Anemometer | an instrument used to measure wind speed |
| Wind Vane | an instrument used to measure wind direction |
| Thermometer | an instrument used to measure temperature |
| Sling Psychrometer | tool made of a wet and dry thermometer that measures relative humidity and requires a table to interpret the two tempertures |
| Barometer | an instrument that measures atmospheric pressure |
| Rain Gauge | an instrument used to measure precipitation |
| Weather Map | a map that uses symbols to show weather data |
| Weather Satellites | a type of satellite used to monitor the weather and climate of the Earth |
| Weather Radar | An instrument that sends a pulse of electromagnetic energy into the atmosphere to find precipitation, determine its motion and intensity, and identify the precipitation type such as rain, snow, or hail |
| Isobar | line on a map connecting two points having the same barometric readings at a given time |
| Isotherm | a line on a weather map that joins places that have the same temperature |
| Cumulonimbus | are thunder clouds. High winds can flatten the top of the cloud into an anvil like shape. Cumulonimbus clouds are associated with heavy rain, snow, hail, lightning and even tornados. The anvil usually points at the direction the storms moving |
| Relative Humidity | the amount of water vapor in the air is usually less than that required to saturate the air. Expressed as a percentage |