Science investigations

Ashmansworthy class have been learning about reversible and irreversible changes. This week we did 3 experiments: We made a saturated salt solution; heated it to evaporate the water and leave salt crystals; and used string to grow crystals from the solution. Come and see how the crystals are growing in class. All these changes are reversible as you can get separate the salt and water out of the solution. We also planned and carried out an investigation to find out what factors can affect the time it takes for sugar to dissolve. We had different types of sugar, different temperatures of water, a range of containers, thermometers and spoons. We found out that the hotter the water, the faster sugar dissolves, and the larger the particle size of sugar the longer it takes to dissolve. We had to make sure we only changed one factor (the water temperature or the type of sugar) and kept everything else the same (number/speed of stirs; amount of water; type of container; amount of sugar).

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