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This lesson covers the cause and process of leaves on deciduous trees changing colors in the fall and dropping from the trees. It teaches about where the green color in the leaves comes from, how shorter days slow down the process of photosynthesis, the fact that there are other colors in the leaves that are covered by the color of the chlorophyll, how the leaves gradually close their connection to the tree and finally drop off, and the fact that the deciduous tree remains dormant during the winter.
The lesson also teaches that different kinds of trees have different colors in their leaves. Four specific examples are given; the oak, maple, aspen, and dogwood.
The lesson closes with a comparison to evergreen trees and how they lose their leaves as well but not all at the same time, and that they have leaves that can withstand the cold temperatures of winter thus the evergreen does not need to rest during the winter.
There are three worksheets with answer sheets included to help reinforce these concepts.
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