← Free resource libraryEnvironmental Engineering • Free activity
Water Filtration Model
Design a model filter and evaluate clarity while learning that clear-looking water is not necessarily safe to drink.
9–1635–55 minFree to usePrintable page
You will need
Bottle cut by adult, gravel, sand, cloth, muddy water for demonstration only
Investigation
What to do
1
Layer filter materials in a cut bottle.
2
Pour demonstration water through slowly.
3
Observe changes in appearance.
4
Redesign the layer order and compare.
5
Do not drink filtered water; discuss why real treatment needs additional processes.
Science thinking
What this develops
Filtration, engineering design, limitations and water treatment.
Safety first
Use age-appropriate supervision and safe materials. Stop any activity that is unsuitable for the learner or environment. These resources are educational activities, not professional laboratory, medical or safety instructions.
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