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What does Rex have in common with grape juice and the air in a tire? They represent three states of matter. Rex, along with grape juice and tires, get involved in two of the demonstrations in this program. Bryant's Giants of Science salutes Archimedes for his way to easily determine the volume of objects.

We can't see energy, but we can observe what energy does. Rex and Judy show that energy exists in anything that that lights up, heats up, moves, or grows.

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Bryant tells the story of Benjamin Thompson, who first discovered heat as energy. Members of The Science Alliance help demonstrate that heat can make matter expand, and that heat travels by conduction, convection, and radiation.

With location footage taped at the Ontario Science Centre and CN Tower, Rex and Judy show what air is made of, what work air can do, and what pressure it can exert.

Bryant's cousin Patrick sings a song to answer two of the five questions. Rex and Judy weigh in with their demonstrations on sound and sound vibrations.

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One of Bryant's stories discusses the elements of water (hydrogen and oxygen, described much differently back in the 18th Century). Rex and Judy demonstrate (among other things) how water is cleaned, and how it can do work.