What happens to each state of matter when heat is increased.
When heat is added to a solid the molecules stay close together, but vibrate violently. When the solid's melting point is reached the solid melts into a liquid.
When heat is added to a liquid the molecules stay jumbled together, but bounce around slightly. When more heat is added the molecules start to turn into a gas. This process is called evaporation.
When heat is added to a gas the molecules fly and bounce around everywhere. They move very quickly. The pressure of the gas becomes increased as well.
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