Weather+Fronts


 * == Weather Wise ==

**Warm and Cold Fronts **
|| **Understanding Basic Concepts** - explain the difference between warm and cold fronts and the factors that influence both of these systems - identify types of weather associated with each front || []

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 * __A Cold Front__**

A cold front happens when a fast-moving mass of cold air hits a warm air mass. The warm air, which holds a lot of water vapour, gets pushed upward quickly.

The water vapour condenses to a lot of water droplets, which form tall clouds. Eventually the weight of the drops can no longer be supported by the air, and they fall.This type of storm is often violent, accompanied by a lot of thunder and lightning, and a heavy rainfall in a short period of time. But it ends quickly.


 * __A Warm Front__**

A warm front happens when a fast moving mass of warm air encounters a cold air mass, and rides up on top of it. The warm, humid air eventually rises high enough for water droplets and clouds to form, and rain to fall.

This type of storm usually covers more area, lasts longer, and will produce a steady rain for a long period of time.

Thunder and lightning may occur, but of a less violent nature than in a cold front.

Write the capital letter A or B at the end each sentence. A = Cold Front B = Warm Front 1. Cool air mass - warm air mass moves in.B.2. Warm air mass - cool air mass moves in.A 3. Brings gentle rains that may last for hours or days.B 4. Strong winds are formed followed by heavy rain, crashing thunder, and flashing lightning.B 5. When the front passes, the temperature warms up and it becomes humid.B 6. When the front passes, the weather turns cooler.A 7. Farmer Brown prefers this type of front.B 8. Usually happens and is over with quickly.A