Science · Grades 5–8
Mixtures and choosing a separation method · Revision card
Particle size, magnetism, solubility and boiling behaviour can help separate mixtures.
Understand the idea
Use differences in properties
Particle size, magnetism, solubility and boiling behaviour can help separate mixtures.
Dissolving is not disappearance
A dissolved substance remains present in the solution.
Keep examples theoretical
Do not taste unknown materials or heat substances without suitable supervision.
Worked examples
Which method can separate insoluble sand from water?
A suitable filter retains the solid particles.
filtration
Which mixture could a magnet help separate?
Iron is attracted by an ordinary magnet; sand is not.
iron filings mixed with dry sand
Explain without looking
- A student says sugar vanished when it dissolved. Describe a more accurate explanation.
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Preview material · independent educational review required. Grade bands are approximate, not official curriculum alignment.