Pupils continued to learn about chemical reactions which take place under certain conditions. They discovered how salt can change from crystal format as it is dissolved in water and, although it is still there, it cannot be seen. Pupils learnt that, by the process of evaporation, the crystals will be left behind as the water evaporates. They also noted how coins can lose their dull coating and be restored to shiny metal by immersing in vinegar.
And finally, pupils enjoyed having fun making their own ‘volcano’ eruption by adding sweets to a bottle of fizzy cola! They learnt that adding the sweets helps gas to separate from the water and form big bubbles which forces the liquid out of the bottle.