Thursday, March 12, 2009

Clouds

Clouds can form differently because of temperature and air pressure.Low altitude clouds are called stratus clouds and are usually seen throughout the sky.The bottom of clouds usually are below zero degrees because the sun can not reach it.Lenticular clouds happen when wind moves upward because of the mountain.Clouds are made of water vapor.First water evaporates.Then it condenses to a cloud.Finally precipitation brings down the water droplets to the ground.Condensation can form dew or frost.Clouds can bring down sleet,rain,freezing rain,hail,and snow.Snow happens when the cloud to the ground is below zero degrees.Sleet is frozen before it hits the ground.Freezing rain happens when the objects on the ground are very cold.When the rain hits the ground it freezes.Hail happens when winds blow upward and carry hail.Soon enough the upward winds can not carry the hail so the hail comes down.Rain happens when it is a very warm climate from sky to ground.

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