Measure the Wind

7-10 year olds | one hour

This science projects lets you measure how fast the wind is blowing. The professional version is called a wind speed indicator and measures in kilometres per hour. Weathermen use this to forecast. This anemometer measures in revolutions per minute. Count the revolutions and compare speeds at different locations and different times of day.

What You'll Need

  • paper cups
  • cardboard strips
  • push pin
  • rubber tip pencil
  • marker
  • ruler
  • stapler


1. Trim the rims off the paper cups.
2. Colour one cup. This will be your marker for how many times your anemometer spins in a minute.
3. Cross the cardboards strips in an ‘X’. Staple them together at the centre.
4. Find the exact middle of the cross by drawing a line between the four inner corners.
5. Once you find the middle of the cardboard cross, push a pin through the centre and attach it to the rubber-side of a pencil.
6. Staple the cups (including the coloured one) to each of the ends of the cross. Make sure the cups are all facing the same way.
7. Hold the instrument level outside and see how many times it revolves.

Tags: science, outdoors

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