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