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Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

Learners work in pairs to design, construct, and test a device that exhibits positive, neutral, and negative buoyancy. They test a number of different objects in water to see if they sink or float.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.