Science Challenge

Science Challenge

Get involved in our October Science Challenge - Meteorology (Weather): Making a Rain Gauge.


  • 2 litre plastic bottle
  • Scissors
  • Duct tape
  • Sand or soil or pebbles
  • Marker pen
  • Ruler


  1. Empty and wash out the 2-litre bottle so it’s nice and clean.
  2. Take the scissors and cut off the spout top right where the taper or curve begins.
  3. Fill the bottom of the bottle with 1/2 inch of sand or soil. This will keep the bottle from falling over on those windy days.
  4. Pour in just enough water so you can see the water above the sand. The sand will be wet! This is called your saturation point.
  5. Use the marker pen to draw a line at the saturation point above the sand/soil/pebbles. Next to the line write “start”.
  6. Line the ruler up (from the start) and draw a line for every 2cm up to the top of the bottle.
  7. Take the top “cut-off” spout portion of the bottle and flip it upside down. Insert it into the bottle and use some duct tape to secure it. This part will help catch and collect the rainfall by funnelling it into your bottle.
  8. Now it’s time to find a good place for your rain gauge outside and record your rain data.

The Science:

The rain gauge collects water. When the water drips or pours into your rain gauge you can accurately measure how much rainfall has occurred. How much rain falls in October? Is this the same as other months? Why is measuring rainfall important?

Please send a photo on Class Dojo to your teacher. All entries will receive a sticker.

Science of the Month

Choose one of the following topics to investigate:

  1. Investigate Rainbows – how many colours are there really? What is a colour spectrum?
  2. Find out why the Scientist Benjamin Franklin flew a kite in the rain.
  3. Draw a diagram of the water cycle.

You can also download our Science Challenge as a PDF.