Online worksheet · 1 of 4
Recover a dissolved solid - Online practice 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
Read before answering
Dated-observation exercise: A labelled salt solution starts at 40 ml; after several days the liquid level is lower. No times or amounts beyond this record may be invented. Evaporation changes liquid water to vapour; it can leave dissolved salt behind. This is a supplied record, not a heating task. No boiling, tasting or unlabelled samples; adults manage any real demonstration.
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Check a calculation · Year 5 onward
Use this only when your teacher or adult allows a calculator for the task. Show your thinking first. It does not replace mental or written arithmetic and does not mark your lesson answer.