Guinea Pig Virtual Pet

Friday, December 4, 2009

Why Do Leaves Fall?

The reason why leaves fall is when leaves are not functioning. The leaves turn crusty and change their color and become weak. So when a wind comes to a tree most of the tree will fall. The tree actually like throw the leaves. When the days grow colder the tree sends a chemical message to the leaves telling the leaves time to go.

If you like to know more, listen to the audio file from NPR.org.

Caption image: Picture of a leaf cell
Source NPR .org

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