Some examples of common substances that change in state as they are heated or cooled are:
1. Water: It exists as a solid (ice), liquid, and gas (water vapor) at different temperatures.
2. Wax: It changes from a solid to a liquid when heated and solidifies again when cooled.
3. Metal: It can change from solid to liquid and back to solid when heated or cooled, depending on the specific metal and its melting point.
4. Alcohol: It changes from a liquid to a gas when heated and from a gas to a liquid when cooled.
5. Oxygen: It changes from a gas to a liquid when cooled and from a liquid to a gas when heated.
6. Carbon dioxide: It changes from a gas to a solid (dry ice) when cooled and from a solid to a gas when heated.
7. Chlorine: It changes from a gas to a liquid when cooled and from a liquid to a gas when heated.
8. Mercury: It changes from a liquid to a gas when heated and from a gas to a liquid when cooled.
Name some common substances thay change in state as they are heated or cooled
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