We are very fortunate to have scientists from Johnson Matthey in this week to work with all year groups for British Science Week.

This morning’s assembly was a very exciting demonstration of an iodine clock, to start out theme of “Time”.

We thought you might enjoy a short clip of the clock.

Iodine clock

As you might remember from your own school chemistry, iodine goes blue-black in the presence of starch.

You can find out more: RSC explanation Iodine clock