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This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface.

In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

In this simulation, learners explore how ocean currents spread all kinds of pollution—including oil spills, sewage, pesticides and factory waste—far beyond where the pollution originates.

In this activity, learners cut out and assemble wheels to explore how variations in fish body structures (mouth shape/position/teeth, body shape, tail shape, and coloration patterns) allow fish to sur

Millions of organisms can live in and around a body of water.

In this activity, learners make a model of a one-way heart valve to investigate how a heart controls the direction of blood flow.