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Seaweed Art Cards
  • Make a Water Filter

    Because most of our water supply comes from rivers, reservoirs and under the ground, it often starts off dirty. To make it safe to drink, the water we use in our homes has to be cleaned at a water purification plant. Try making a water filter to demonstrate how this is done.

    Materials:

    • Two pitchers or large glass measuring cups
    • Pen
    • Large spoon
    • Scissors
    • Grass and leaves
    • Soil
    • Coarse sand
    • Gravel or small pebbles
    • Coffee filter
    • A clean flower pot
    • Water

    Spoon some small amounts of soil, sand, gravel, grass and leaves into the pitcher of water.  Stir everything together. Stand the flowerpot on the coffee filter and trace around it. Cut it out. Put the circle of coffee filter at the bottom of  the flowerpot. Fill the flowerpot halfway with sand and then add a layer of gravel. Stand the flowerpot on top of the empty pitcher. Slowly pour the muddy water into the filter. You will see that the water that runs out of the filter is cleaner than the water poured in because the filter traps a lot of dirt.

    Published on March 29, 2011 · Filed under: 10-13 year olds, 5-9 year olds, Earth Day;
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