The state of the atmosphere at a specific time and a specific place.

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 The amount of water vapor present in the air

Transcript of The state of the atmosphere at a specific time and a specific place.

Page 1: The state of the atmosphere at a specific time and a specific place.

WeatherMrs. Trotter’s 7th Science

WATCH

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What is weather? The state of the atmosphere at a

specific time and a specific place

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Humidity The amount of water vapor present in

the air

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Relative Humidity the measure of the amount of water

vapor present in the air compared to the amount needed for saturation at a specific temperature

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Dew point The temperature at which air is

saturated and condensation forms is the dew pointHumidity vs dew point

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what is fog?When air is cooled to its dew point near

the ground, a stratus cloud is formed that we call fog

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CloudsThey are classified by shape and height

stratus cirrus cumulus

add nimbus to any name means that the cloud has rain or snow attached to it

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Cumulus masses of puffy white They tower at great heights and can be

associate with thunderstorms

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Cirrus appear fibrous or curly They are high and thin white and feathery made of ice crystals because of their

height

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Stratus form at very low altitudes associated with fair weather, rain , or

even snow

Clouds are awesome to watch! Each one is unique

watch

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Precipitation Water falling from clouds

snow ice rain hail sleet

The air temperature determines whether water forms rain, snow, sleet or hail

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Open your book Chapter 16 Weather Page 454