Changing States of matter (1)

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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


1. Examine changing state of water cycle!

2. What is technology which implement concept of changing state of mater?

3. Why does water that is heated continuously run out?

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