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the state of the atmosphere at a specific time and place. Weather describes air pressure, wind, temperature, and the amount of moisture in the air


the amount of water vapor present in the air

relative humidity

If the air is at 100% relative humidity, sweat will not evaporate into the air. We feel much hotter than the actual temperature when the relative humidity is high

dew point

The temperature at which air is saturated and condensation forms


air is cooled to its dew point near the ground, it forms a stratus cloud called fog


the falling to earth of any form of water (rain or snow or hail or sleet or mist)

air mass

large body of air that has properties
similar to the part of Earth's surface over which it develops


boundary between two air masses of different density,
moisture, or temperature


violently destructive windstorm with a funnel-shaped cloud extending toward the ground


a storm with widespread snowfall accompanied by strong winds


person who studies the weather

station model

shows the weather conditions at a specific location
on Earth's surface; it is recorded on a map using a combination of symbols


line that connects points of equal temperature


line drawn to connect points of equal atmospheric pressure

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