CONDENSATION To know that condensation is the process of gas cooling to form a liquid.Mª Teresa Villarroya I Font
WHAT IS CONDENSATION? It’s the cooling process that changes gas into liquid. It’s the opposite of evaporation.
NAME THE CHANGE LIQUID GAS LIQUID GAS EVAPORATION CONDENSATION
LOOKING AT THE OUTSIDE OF A GLASS OF ICED WATER… • What has happened ? • Why has it happened ? • What is it called ?
Iced water in a glass: Droplets of w―――― form on the outside of the glass. When water v――――― in the air hits the c――― surface of the glass it condenses into l――――― water droplets. ( liquid, water, cold, vapour )
LOOKING AT THE BREATHINGON A MIRROR… • What has happened? • Why has it happened? • What is it called?
Breathing on a mirror Water v――――― in the breath hits the cold mirror and c―――――――― into water d―――――――. The mirror “steams up”. After a while the liquid droplets on the mirror e―――――――― into the air as water vapour, and the mirror clears. ( droplets, vapour, evaporate, condenses)
LOOKING AT THE DEW ON THE GRASS • What has happened? • Why has it happened? • What is it called?
The dew on the grass • Water v――――― in the a―― hits a cold surface and c―――――――― into water d―――――――. (condenses, air, vapour, cold, droplets)
LOOKING AT THE FROST ON THE TREE • What has happened? • Why has it happened? • What is it called?
The frost on the tree • When temperature is b―――― 0ºC, water v――――― in the a―― hits the cold surface and c――――――― into a t――― white layer of i――. ( condenses, below, ice, air, vapour, thin)