How Big is My Fish?

A yellow and blue tub with cut out fish and small fishing poles sits in front of a fake stone wall and jungle scene.
A yellow and blue tub with cut out fish and small fishing poles sits in front of a fake stone wall and jungle scene.

Objects such as a fish can be measured in different ways.

How it works

Catch two toy fish and compare the fish on a ruler and a set of weighing scales.

Things to try or ask around the exhibit

  • How long is your fish? Will your next fish be shorter or longer?
  • Catch a second fish. Which fish feels heavier? Try using the scales to find out which is heavier and which is lighter.

Background

We often measure something so it can be compared against other similar items, such as whether it's heavier, lighter, shorter, longer, more dense, more brittle, more nutritious, etc.

Finding the science in your world

While humans often try to measure 'by eye' or 'by hand', more accurate methods of measurement can be obtained by using standardised tools.