Lesson: Chapter 3 — Mixtures

3.3. Separating the components 2 of 6 Reset answers

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Question 2

Sieving is used to remove gravel from sand. Which physical property does it use?

A The difference in boiling point B The density difference between the components C The difference in the size of the component particles D The magnetic property of a component

The right answer is the one marked above.

The difference in the size of the component particles. Particles smaller than the holes pass through; larger ones do not.

Winnowing, panning and sluicing all use the density difference instead. Sieving and filtering are the two that work on particle size.

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