What is Changing State of Matter?
A change of state is a physical change in a matter.
Matter changes state when energy is added or taken away. Matter changes because of heat energy or pressure.
Boiling point is a temperature at which a pure liquid changes into a gas. (100oC)
Melting point is a temperature at which pure liquid changes into solid. (0oC)
Kind of changing states of matter
1. Evaporation = liquid to gas. Example = boiling water
2. Condensation = gas to liquid. Example = dew.
3. Freezing = liquid to solid. Example = ice cube production
4. Melting = solid to liquid. Example = melting ice cream
5. Sublimation = solid to gas. Example = mothball, dry ice
6. Deposition = gas to solid. Example = snow