Question: Why do leaves change color in the fall?

  1. When leaves change colour, it means the tree or plant is going into a long sleep.
    ‘Chlorophyll’ is the green chemical that helps all green plants change light into energy for food.

    In places of the world that have very cold winters, these plants need to sleep to save energy, otherwise they would use way too much to stay alive.

    So the leaf colour chages when you see the plant taking back the chlorophyll into its branches. Once the green colour goes, the leaf starts to die and changes slowly to a brown colour before falling off.