Soap bubbles, balloons and marshmallows expand when placed in a vacuum.
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As the air is pumped out of the test tube and the pressure decreases, the water starts to boil.
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Thermal convection currents in water can be imaged by using a beaker as a lens!
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The temperature of the surface is so hot that water droplets bounce and dance.
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An example of how every day products can be optically active.
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