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"Cold" metal and "warm" wood may be the same temperature.
Soap bubbles float on a cushion of carbon dioxide gas.
Polarized light reveals stress patterns in clear plastic.
Break water into hydrogen and oxygen with a simple device.
A magnet falls more slowly through a metallic tube than it does through a nonmetallic tube.
Store up an electric charge, then make sparks.
Graphing can be a slippery slope to understanding.
Different kinds of light can be used to study life.
Stain your clothes on purpose.
This density column always returns to its original three layers.
Just spew it—build your own cyclic hot water fountain.
Visualize the spectacular fluid motion of convection cells.
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