Page 43 - e book prim 6
P. 43
Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025
Change from liquid to gas Change from gas to liquid
(evaporation) (condensation)
Evaporation (vaporization): Condensation:
It is the change of state of matter from It is the change of state of matter from
liquid state to gas state. gas state to liquid state.
● On heating a liquid matter.
● On cooling a gas matter.
The thermal energy of molecules of liquid The thermal energy of molecules of gas matter
matter increases. decreases.
●The force that holds these molecules ●The force that holds these molecules together
together decreases so; they vibrate faster. increases so; they vibrate slower.
●Molecules start to move away from each ●Molecules start to get close together, so the
other, so the liquid matter vaporizes into gas gas matter changes to liquid matter and this
matter and this process is called process is called "condensation"
"evaporation". Example: Water vapor changes to water.
Example: Water changes to water vapor.
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