In our science, we have been learning about how water is made clean for drinking and general use. This got us thinking about the science behind all of it. Cue us experimenting with materials to create our very own filters. We used cotton wool, sand and even activated charcoal to purify water we found in muddy puddles outside. Naturally, we could not be sure it was 100% safe so we didn’t drink it but it looked pretty clear once it had gone through our homemade filters.

We then went onto learn about how some changes are reversible and some are irreversible by mixing together lots of substances and using our filters and other techniques to “reverse” the process. It really made us think about irreversible changes such as dissolving sugar in tea (for example).

We are going to go on a school trip to Fair Isle’s water plant to see how the filtration process works here in our island.