• Filtration Device

    60 Minutes | All | Outdoors

    Make a water filtration device



    Download Worksheet

    Filtration Device

    60 Minutes | All | Outdoors
    Download Worksheet
    You will need

    • Dirty water
    • Plastic water bottle or 2-litre drink bottle
    • Scissors
    • 2 coffee filters
    • Sand
    • Gravel/pebbles
    • Rocks

    Instructions

    1. Fill a cup ¾ full with water
    2. Make it dirty by adding some dirt or sand, and then set it aside
    3. Have an adult use scissors if you need help, cut the plastic bottle in half and poke a hole in the lid
    4. Turn over the top part of the bottle so the lid is facing down, and place it in the bottom portion of the bottle
    5. Put the coffee filters inside the top part of the bottle and push them down
    6. Pour some sand onto the coffee filter
    7. Then place some pebbles on top of the sand layer
    8. Next place some bigger rocks over the pebbles
    9. Slowly pour your glass of dirty water into the bottle over the rocks
    10. What do you notice about the water that drips into the bottom part of the bottle?
    11. Even though your filtered water looks clearer, it might contain bacteria
    12. To make it safe to drink, it would need to be boiled for 5 minutes

    Safety

    • Always remain aware of your surroundings and follow local COVID-19 advice, including the Hands / Face / Space / Ventilation guidance.
    • If you’re meeting online, check out the advice on using Zoom and other popular digital platforms and the guidance on being safe online.
    • To help others do activities safely over Zoom, check out the example risk assessments and remember to make sure those taking part understand any care that needs to be applied.
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