WATER IN THE ATMOSPHERE Honors Earth science Chapter 16.
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Transcript of WATER IN THE ATMOSPHERE Honors Earth science Chapter 16.
![Page 1: WATER IN THE ATMOSPHERE Honors Earth science Chapter 16.](https://reader036.fdocuments.in/reader036/viewer/2022070611/5a4d1bb57f8b9ab0599ce53c/html5/thumbnails/1.jpg)
WATER IN THE ATMOSPHERE
Honors Earth scienceChapter 16
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Water vapor
• Is a gas• You cannot see it!!!
• What state of matter are:– Clouds?– Fog?
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Give examples of water in the atmosphere
• Solids-
• Liquids-
• Gas-
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Water changes state(from worksheet)
• Liquid → Solid– freezing
• Solid → liquid– melting
• Gas (water vapor)→ liquidcondensation
• Liquid → gas– evaporation
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Water changes state• Gas to solid?
Deposition– Frost
– Solid to gas?– Sublimation
• Dry ice
– Most water vapor enters atmosphere through– EVAPORATION
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WORKSHEET
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LATENT HEAT
•la·tent heat- nounPHYSICS•the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature.
•Energy (heat) that is used during a phase change
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http://jamaica.u.arizona.edu/ic/nats1011/lectures/ch05/FIG05_006.JPG
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Relative Humidity
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Capacity of Air is dependent on temperature
• Warm air can hold more water vapor than cold air!!
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relative humidity
• Temp.= 31ºC water vapor in air= 25 g• Calculate the rh:
25/29.4= .85 x 100= 85%
85% of the air is filled with water vaporWhat happens at 100% RH?condensation!
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Relative humidityuse real data
• Air temp= • Relative humidity is
• What is the water vapor content?
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How do we measure water vapor content?
• Cool it until it can’t hold anymore moisture.• This temp is DEW POINT• Then use chart
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Dew point• Temperature at which
100% humidity occurs• (condensation temp)
• Frost will form if DP is below freezing– Gas solid
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Who cares about dew point?
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• Lawn care • Sports on grass• Farmers/ Gardeners• Bad hair days?• Tell the humidity
– When air temp. is closer to dew point temp, humidity is higher
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Today’s weatherGrosse Pointe