 |
Carefully cut the bottom off the
bottle.
|
 |
 |
Turn the bottle upside down and plug the
neck with cotton wool.
|
 |
Put a thick layer of clean, washed gravel
on top of the cotton wool.
|
 |
Put a thick layer of clean, washed sand on
top of the gravel.
|
 |
Cut out a circle of paper towel and lay it
on top of the sand.
|
 |
Stand your filter on top of a clean jar or
beaker.
|
 |
Mix two or three spoonfuls of garden soil
with some water in the other jar or beaker and stir it thoroughly.
Slowly pour this muddy water onto the disc of paper towel in your
filter.
|
 |
Describe the water that comes out of your
filter.
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