Introduction

This week, you are going to perform an experiment to investigate how the physical properties of common liquids change when they are frozen.

Like last week, this simple experiment can be performed in your kitchen, but the science behind your results goes far beyond it. In fact, the physical properties of one of the liquids you will freeze are fundamental to life on our planet.

As you work through this week, try and remember the scientific techniques you covered last week, such as making precise measurements, recording data and observations and interpreting any results.

So, clear some space in your freezer and get started!