About this worksheet
A scientist has mixed up the lab notes. On this three-page Year 5 sheet, a reminder box says changes of state, dissolving and mixing are usually reversible, while burning, cooking, rusting and chemical reactions usually are not. Pupils then sort twelve changes into two columns. The list splits six and six and includes dissolving salt in water, frying an egg and vinegar on bicarbonate of soda. Two Follow-Up Questions ask for the hardest change to place and one new change for each column, with a reason. The answer key gives a short reason for each change. It follows the England National Curriculum.
