The lesson began as we carefully watched some drops of hot water cool and evaporate… slowly, crystals of salt appeared. It hadn’t just been water after all!

Year 5 have been learning about dissolving materials but not all materials dissolve. We made predictions about seven common materials and set about testing to see whether they dissolved in water, only mixed with it or perhaps did a bit of both. Some of the materials came as a surprise – our hot chocolate very slowly settled to the bottom of the water!