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Mixtures can be separated by sieving (separation by size) or by centrifuge (separation by density).

Sieving basically means passing the mixture through a filter or screen. The particles that are bigger than the openings in the filter or screen are retained. Particles smaller than the openings pass through.

Separating by centrifuge means putting a vessel containing the mixture into a device which spins at a high rate, increasing the force acting on the particles in the mixture to a force greater than that of gravity.

Agitation, without centrifuging, can also cause separation in some mixtures. Agitation can cause separation based on both size and density. This is why the small bits of your cereal always end up at the bottom of the box.

Hope that helps.

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15y ago

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