1. Put 2 drops of each color in the cold water glass and the hot water glass.
2. Observe the glasses for at least 1 minute.
What Did You Learn?
Rub your hands together really quickly. Do you feel the heat you generated? Supersonic airplanes, like the SR-71 Blackbird, generate heat as they fly through the air. The Blackbird gets so hot that the molecules move faster and the airplane material expands. Because of this expansion, the Blackbird is actually 1 foot longer when it is flying!
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