Processes To Purify Water

Duration: 2½ Weeks / 8¾ Hours

After the completion of Topic 6 the learners will be able to:

  • explain why clean water is important for people, plants and animals;
  • describe ways of purifying water in class or at home;
  • design, make and evaluate a simple system to clean dirty water (such as a sand filter) according to specifications and constraints;
  • provide a summary of how water is cleaned by municipalities to ensure we have clean water in our homes.

Content and Concepts: Please select a sub-category below

You will need


  • Computer
  • Data Projector
  • Speakers
  • Internet connection

Powerpoints and Photocopies

Available on category pages
  • PowerPoint 1
  • Worksheets: A, B & C
  • Quiz

School Resources

  • Water


  • Pieces of cardboard with keywords
    • waterlogged soil
    • flood water
    • soluble substances
    • insoluble substances
    • water pollution
    • living germs
    • wetlands are like sponges
    • dambos
  • Plastic cooldrink bottle
  • Coffee powder or hot chocolate granules
  • Yogurt cup
  • Big cooking pot
  • Cling wrap
  • Marbles (4 – 6 small balls)
  • Ruler