Students in Teacher Darlene’s EP M1 Science class carried out the Can Crusher Lab to see how heating and cooling changes the behavior of water molecules. When the water inside the aluminum can was heated, the molecules moved faster, spread apart, and escaped as steam. But when the hot can was suddenly placed upside down in cold water, the water vapor molecules quickly cooled, slowed down, and came back together as liquid. This quick condensation pulls a partial vacuum inside the can causing it to collapse inward because of the greater external atmospheric pressure pushing in, crushing it instantly. The experiment gave students a clear and dramatic example of how molecules move with temperature changes, and how this movement relates to pressure in real life.