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activity: How Clear
is Your Water?
In general, the cloudier water is, the more polluted
it is. This depends on the amount of suspended solids.
What you will need:
- 5 samples of water
- tap water, distilled water and 3 other sources (this could be
tap water from a different area, pond water, river water, sea
water)
- filter funnel and
paper
- several clean, dry
beakers
Click here for
more information on collecting water samples.
What
you will do:
- Pour 100 cubic cm
of the water sample through a filter funnel, containing a folded
filter paper. Do this for each water sample in turn.
- Keep the filter paper
from each sample.
- Compare the amount
of solid collected from each sample.
What do you observe?
You can record your results in a table like this:
| water
sample |
observations
|
| tap
water |
|
| distilled
water |
|
| sea
water |
|
| pond
water |
|
| river
water |
|
Questions:
- Put your samples
in order of how much suspended solids they have. Put the water
sample with the least amount of suspended solids at the top.
- Compare this list
with your results from the pH
and purity tests. Do you notice any
similarities or differences?
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