In Science this half term, Year 5 have been studying 'Properties and changes in materials.'
They investigated solubility and reversible changes.
They tested various substances to see if they would mix with water to form a solution. Some materials were soluble and dissolved in the water. Some materials were insoluble and separated from the water.
We left the solutions out for a couple of days in the sun and warmth. Eventually the water from the salt solution and the sugar solution evaporated. Due to the water turning from a liquid into a gas, it left behind the salt and the sugar. Therefore, these were reversible changes.
The children know four different separation techniques; filtering, sieving, magnetism and as seen in this experiment, evaporation.
