Filtration Device

60 Minutes | All | Outdoors

Make a water filtration device



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Filtration Device

60 Minutes | All | Outdoors

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

  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

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