Answer: Survival skills

survival skills :) 

•     Put the ice into the kettle
•     Change ice to water (melting)
•     The arrangement of particles of water change from closely    packed together become loosely
•     This is because the heat is absorb from the surrounding
•     The water is saves to drink? No, the temperature is not reach 100 C˚.The bacteria still survive. The water is not saves to drink.
•     When the water is saves to drink?
•      When the water (liquid), change to steam (gases). Process of boiling.
•      More heat is absorb from the surrounding
•     The temperature should reach 100 C˚. Means, the water boils until the water has the bubbles and the bubbles release to the atmosphere.
•     The arrangement of particles become far apart, not attract to each other and its spread out in all direction.