Water Filtration
We learned about waste water treatment. Water is filtered through gravel and sand to clean any small parts of dirt. Our aim this morning was to use a filtering method to clean dirty water. For this experiment you need: Plastic bottle and scissors or jar and funnel, dirty water, filter paper, cotton wool, stones and gravel.
Method:
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Cut the bottle into a jar and funnel and position as per the diagram below.
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Fold the filter paper in half and than divide it so that there are three pieces and one piece the other side.
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Dampen the edges of the filter paper.
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Poor in half of the water and record what happened.
- The same process using stones and gravel and sand and compare the defence.
Results: Both filters made the water cleaner but the filter paper worked better.
Conclusion: We learned that dirt can be removed from water by filters.
