As part of our immersion into our new expedition, Years 5 and 6 spent a day investigating changes in states of matter, understanding how solid substances such as salt and sugar can dissolve in water (becoming liquid), then the water evaporates to reverse the change of state, leaving solid crystals of salt or sugar.
We also understood how sand didn’t dissolve in water, but remained solid, sinking to the bottom of the liquid. We were able to retrieve the sand by using a filter.
We discussed how, in the past, science was unable to explain these changes of state and may have led to claims of witchery.
