CondensatioCondensationn

•To know that condensation is the process of gas cooling to form a liquid

So what is So what is CondensatioCondensatio

n?n?•Condensation is a process, a change•It’s the cooling process that changes gas into a liquid•It is the opposite of evaporation.

Particles again Particles again folks!folks!

Dry Dry dayday

Wet Wet dayday

Air particlesWater particles

Dry dayDry day•On a dry day there is only a little water vapour in the air

Wet dayWet day•On a damp day there is much more water vapour in the air

Bathroom Bathroom mirrormirror

•After a shower your bathroom is filled with steam (water vapour) from the hot water.•When it hits the cold glass of the mirror it turns back to water and forms tiny dropletsH e l l H e l l

o !o !

Look at the Look at the cancan

•What has happened?•Why has it happened?•What do we call the process?

Look at the Look at the glass of iceglass of ice•What has happened?•Why has it happened?•What do we call the process?

Look at mirror Look at mirror on top of the on top of the

hot drinkhot drink•What has happened?•Why has it happened?•What do we call the process?

Breath on Breath on your mirrorsyour mirrors•What has happened?•Why has it happened?•What do we call the process?

CondensatiCondensationon•To know that condensation is the

process of gas cooling to form a liquid

09-10-06

Task 1 – choose the best word to complete these sentences

1.Condensation happens when water vapour … cools/heats

2.Condensation is the opposite of … dissolving/evaporation

3.On a wet day there are more… air particles/water particles in the air

Next…Next…•Illustrate what happens when steam from a kettle hits a cold window

•Useful words–water vapour -steam–gas -liquid–cools -heats–evaporation -condensation–process -changes

ExtensionExtension•Explain in your own words what happens on a cold day when you breath on a cold window•List other examples of condensation

What have What have you learnt?you learnt?•What is condensation the process of ?•Can you give 3 examples of condensation happening?