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filtration
Sand particles are trapped while water passes through.
Class 5 · English Medium · Cambridge · General science
Materials, mixtures and reversible changes
Explore materials, mixtures and reversible changes with an example and your own answers.
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
A mixture contains substances together. Filtration can separate an insoluble solid from a liquid; evaporation can recover some dissolved solids.
Worked example
Sand can be filtered from water. Salt dissolved in water can be recovered by supervised evaporation; never taste laboratory mixtures.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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evaporation
Water leaves as vapour and salt remains.
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yes
The liquid water can be frozen again.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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magnet
A magnet can attract iron filings.
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evaporation
Evaporation removes the solvent while salt remains.
Write in your own words. A guardian or teacher should review this response.
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Dissolving mixes salt particles through water. Melting would change solid salt itself into liquid salt.
Distinguish a solution from a state change; this is a paper explanation, not a heating experiment.
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