Experimento

Water and air :

Water can change from one state to another.

• When liquid water gets very cold, it freezes and becomes a solid (ice, frost or snow). 
• This is solidification.
• When ice or snow gets warm, it becomes liquid water. 
• This is melting.
• When liquid water gets hot, it becomes water vapour. 
• This is evaporation.
• When water vapour gets cold, it becomes liquid water. 
• This is condensation. 
•  It is condensation when windows steam up on a cold day.