Unit 5D: Changing State. Changing State Unit 5D: Changing State: Vocabulary Unit 5D: Changing State Some useful words Evaporation Condensation Boiling.
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Unit 5D: Changing State: Vocabulary
Unit 5D: Changing State
Some useful words
Evaporation
Condensation
Boiling temperature
State
Change of state
when a liquid changes to a vapour (gas)
when a vapour changes to a liquid
the temperature at which a liquid boils, for water it is 100 C
the 3 states are solid, liquid and gas
when a substance changes from one state to another
Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.
Unit 5D: How quick does a puddle dry up?
How quick does a puddle dry up?
Which puddle do you think will dry up the quickest? Why do you think this?
What factors do you think affect how quickly a puddle dries up?
Choose one of these to investigate
Temperature Wind Volume of water
Surface area of puddle
Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.
Unit 5D: How quick does a puddle dry up?
…cont
Make a prediction. What do you think you will find?
What apparatus will you need?
Explain how you will carry out your experiment?
What will you measure?
How will you record your results?
How will you keep the test fair?
Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.
Unit 5D: How quick does a puddle dry up?
Support slide
The bowls represent puddles with different surface areas
Which of the bowls of water do you think will dry up the quickest? Why do you think this?
To make sure the test is fair, each ‘puddle’ must have the same volume of water in it and they need to be kept in a room at the same temperature.
The time it takes for each ‘puddle’ to evaporate needs to be recorded. We will check the ‘puddles’ every day to see which evaporates the quickest
Unit 5D: Drying: L.O. 9: N.C.
Unit 5D: Drying
Drying
How do these appliances help things dry more quickly?
Unit 5D: Condensation: L.O. 10, 11, 12: N.C.
Unit 5D: Condensation
Condensation
Where else do we see condensation?
Unit 5D: Melting Ice: L.O. 18, 19: N.C.
Unit 5D: Melting Ice
Melting Ice
Take the temperature of the ice and water every 5 minutes for 2 – 3 hours. Record the results.
Time Temperature
Unit 5D: Melting Ice: L.O. 18, 19: N.C.
Unit 5D: Melting Ice
…cont
What temperature did you end up at?
What do you think would have happened if the room was 10 degrees hotter?
Unit 5D: Changing State: Summary
Unit 5D: Summary
Changing state
Evap
orat
ion
Liquid > Gas
Not just water
Depends
on
Temperature
Volume of water
Wind
Surface areaBoiling
Liquids evaporate quicker
Water boils at 100ºC
Wate
r cy
cle
Reversible
Condensatio
n
Gas > Liquid
Reverse of evaporation
Air contains
water
Condenses on a cold surface
Bedroom window
Cold pop can
Melting
Freezing
Evaporating
Water evaporates from lakes
Condenses as clouds
Falls as rain
Collects in rivers
Process starts again
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