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In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust.

In this demonstration, learners observe vinegar and baking soda creating carbon dioxide (CO2) in a bottle. The gas is poured out of a bottle onto a candle flame, putting out the candle.

In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.