In this unit, students will investigate plant adaptations that prevent water loss by using a simple sponge model. Deciduous leaves are represented with an exposed dish sponge, and evergreen leaves are represented by placing a wet sponge inside a thin plastic bag. After this activity, students should be able to describe the advantage of a plant adaptation (a waxy leaf surface), track the change of the state of water, and apply the Law of Conservation of Matter.
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