A substance can exist in three different states: solid, liquid or gas.
Each of the two statements below describes a change of state.
change 1 Molecules move closer together but continue to travel throughout the substance.
change 2 Molecules stop travelling throughout the substance and just vibrate about fixed positions.
Which changes of state do these statements describe?
1 )
change 1:condensation / change 2:melting
change 1:condensation / change 2:solidification
3 )
change 1:solidification / change 2:condensation
4 )
change 1:solidification / change 2:melting
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