Thames & Kosmos Global Water Quality handleiding
Handleiding
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EXPERIMENT 2
Not everything can be filtered
Explanation:
The colored water flows quickly through the filter system. But its
cleaning power is very poor: The water in the collecting cup is still
the same color as before.
Dirty water consists of more than just impurities that you can see
with your naked eye. It can also contain microscopic particles.
Particularly dangerous particles are bacteria, which can cause
diseases, and toxins. These kinds of impurities cannot be filtered out
by your water filter. Other cleaning processes are needed to turn
dirty water into clean drinking water.
What happens when you filter watercolor paint or ink?
You will need:
water-filter system, small measuring cup,
as well as: ink, watercolor paint mixed in water
(not included)
1
In a small cup, mix water with a few drops of ink
or some watercolor paint.
2
Pour the colored mixture into the filter column.
3
Study the water in the collecting cup. What do
you see?
5
Global Water Quality Manual 2013.indd 5 2/7/13 10:22 AM
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Global Water Quality |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3490 MB |
