The document discusses four state changes of matter: melting changes solids to liquids, evaporation changes liquids to gases, freezing changes liquids to solids, and condensation changes gases back to liquids when they contact a cold surface.

2. Melting is changing the solid state into a
liquid state
SolidSolid LiquidLiquid

3. Melting is changing the solid state into a
liquid state
SolidSolid LiquidLiquid

4. Evapouration is changing the liquid state
into a Gas state
GasGas
Water vapourWater vapour
LiquidLiquid
WaterWater

5. Freezing is changing the liquid state into a
solid state
SolidSolid
Ice cubesIce cubes
LiquidLiquid
WaterWater

6. Condensation is changing the gas state
into a liquid state [ when it touches a cold surface]
LiquidLiquidGasGas

7. Condensation is changing the gas state
into a liquid state [ when it touches a cold surface]
LiquidLiquidGasGas