Condensation

1
Condensation

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

2
So what is Condensation?

• Condensation is a process, a change
• Its the cooling process that changes gas into a
  liquid
• It is the opposite of evaporation.

3
Particles again folks!
Air particles
Water particles
Dry day
Wet day
4
Dry day

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

5
Wet day

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

6
Bathroom mirror

• 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 droplets

H e l l o !
7
Look at the can

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

8
Look at the glass of ice

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

9
Look at mirror on top of the hot drink

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

10
Breath on your mirrors

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

11
Condensation
09-10-06

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

• Task 1 choose the best word to complete these
  sentences
• Condensation happens when water vapour
  cools/heats
• Condensation is the opposite of
  dissolving/evaporation
• On a wet day there are more
  air particles/water particles in the
  air

12
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

13
Extension

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

14
What have you learnt?

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