Cleaning Dirty Water

Cleaning Dirty Water

We put soil in water, mixed it well, then let it settle.

It was very interesting to see the layers that were the result of the settling (soil on the bottom, dirty water in the middle and leaves and twigs on the top).

Then we decided to clean the water using filters.  We were allowed to select from the following items: sieve, cloth, cotton wool, coffee filters, stones, sand.  We made these into a filter and put the dirty water in.  Our most successful filter was the sieve and coffee filter.  We know that waste toilet water gets filtered, and so does waste waster on the International Space Station.  We enjoyed making our own decisions when carrying out this investigation.

https://www.youtube.com/watch?v=BCjH3k5gODI