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In this simple demonstration, learners investigate the properties of air pressure. Learners place an index card on top of a glass full of water, then invert the glass.

In this indoor or outdoor water activity, learners pour water from small cups to large cups and containers. In doing so, they discover water takes the shape of its container.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

Learners investigate how the temperature of water affects its density.