Lesson Objectives...
Ask questions to refine our model of plants to show the inputs and outputs, and energy and matter flows over time to explain how food molecules can be present during times that plants do not have leaves or chloroplasts.
Maple trees are tapped in early spring before there are any leaves.
Maple trees have sap, or food, even in the winter when there aren't leaves on the tree.
People have been tapping trees for sap for a long time.
Besides maple trees, there are other trees that produce sap, which can be collected and made into syrup.