CLOUDS. What are clouds? .

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CLOUDS

Transcript of CLOUDS. What are clouds? .

Page 1: CLOUDS. What are clouds? .

CLOUDS

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What are clouds?

http://retards.org/photography/dimage/photographs/2001/10/08/20011008_173048-800.jpg

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Clouds are visible masses of ice particles or water droplets

suspended in air.

They are not a gas!!!

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What does it take to make a cloud?

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Cloud Ingredients:

1 – Water Vapor

All clouds are made from water vapor that has condensed from the air.

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Cloud Ingredients:

2 – Dew Point Temperature

Air must be cooled to its dew point for condensation!

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Cloud Ingredients:

3 – Condensation Nuclei

A solid surface on which condensation can take place.

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How do condensation

nuclei get into the air?

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Dust Storms

http://www.mountwashington.org/notebook/images/drought/dust-storm.jpg

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ash

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Pollution (smoke)

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Forest Fires- smoke

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How do cloud droplets

form?

Vapor

Coalesces

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Cloud Formation:

1. Warm, moist air rises.

2. Rising air cools to its dew point.

3. Water vapor condenses on particle to form liquid cloud droplets.

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* Clouds can only form in warm rising air!

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Resources• http://www.cs.wisc.edu/~sastry/calendar/clouds.jpg• http://retards.org/photography/dimage/index.php?keyword=sky&nav=keyword• http://apollo.lsc.vsc.edu/classes/met130/notes/chapter6/graphics/drop_cloud_ccn.gif• http://vortex.plymouth.edu/precip/CCN1.jpg• http://www.life.uiuc.edu/bio100/lectures/s97lects/05Succession/ruapehu.jpg• http://www.climatesolutions.org/images/burningFossil.jpg• http://www.jonesctr.org/research/graphics/forest_fire.jpg