Basic Processes

Condensation

BoilingEvaporation

Melting

Freezing

Temperature

We can measure the temperature with a

thermometer• Temperature is a

measure of how hot something is.

• There are figures on the thermometer.

• We use the Celsius scale in Hungary.

• Americans use the Fahrenheit scale in the USA.

Freezing

• When the temperature of the air is 0 °C, water starts freezing and becomes ice.

• The freezing point of the water is 0 °C.

Melting

When the temperature of the air is 0 °C ,

ice starts meltingand

becomes wateragain

• Heat makes water turn into a gas.• The gas is called water vapour.• The boiling point of the water is 100

°C.

Boiling

Evaporation• When the temperature of the water is near

the boiling point, water evaporates.

Condensation

• water vapour begins to change to tiny water droplets

• the opposite of evaporation

Condensation

Condensation