Properties of Matter

Waterproof Sieve

Enrichment Activity for 5-11 11-14

What you need

  • A glass bottle
  • A sieve
  • Water


  1. Fill the bottle with water and hold the sieve over the top of it
  2. Turn them both upside down, making sure that the top of the bottle is in contact with the sieve at all times. (It’s best to do this over the sink or outside…)

Results and Explanation

The water stays in the bottle! The surface tension of the water across the fine mesh of the sieve stops the water flowing through the holes.

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