What is
pure
water?
Answers
on your
sheet
now
please….
quickly!
What is in sea water?
Answers
on your
sheet
now
please….
quickly!
Can you drink sea water?
Answers
on your
sheet
now
please….
quickly!
You are stranded on a desert island and have no water to
drink. You are getting very thirsty... How could you use
sea water to produce water that you can drink?
USE THE WORDS BELOW TO HELP YOU!
Drink...hole... Condense... Water... Salt... Evaporate... Sand...Cling film... Water vapour...
You are stranded on a desert island and have no water to
drink. You are getting very thirsty... How could you use
sea water to produce water that you can drink?
First I would collect ............... from the sea. I would put this water into a
.............. in the ........... I would put a sheet of .................. over the hole. Over
time the water would ...................... and the ................... would be left behind.
When the ................. hits the cool surface of the cling film it will ...................
and turn back into liquid water. This contains no salt and so I can ..............
it!
Drink...hole... Condense... Water... Salt... Evaporate... Sand...Cling film... Water vapour...
Distillation
Demonstration
Water vapour
Pure water
Sea water
Label the diagram.
1.Complete the
diagram worksheet
2. Explain the
process of distillation
Thermometer
Water vapour
Water vapour rises
and goes into the
Liebig condenser
Cold water out
Condensation:
The water vapour cools and
turns into liquid
Flask of sea water
Cold water in
Sea water
Pure water
Pure water drips
into the beaker
How can getting clean water from
seawater help the world?
Is the desalination process sustainable?
What are the issues for different parts
of the world ?