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In this activity, learners test exhaled breath for carbon dioxide and learn how to use an indicator as a simple way to measure pH.

In this activity, learners discover how their heart rate changes in different situations.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

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 smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.