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In this activity, learners will use cereal to conduct an experiment and investigate how decreased bone density is related to increased risk of bone fracture.

Learners observe working lava lamps to understand how they work (included in PDF link).

In this activity, learners can create five-layer density columns by employing one of three (or all) methods.

In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.

In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.

In this activity, learners use basic measurements of the Earth and pieces of rock and iron to estimate the mass of the Earth.