Understanding Substances and Mixtures

Mixture of sugar and hot water.

• Homogeneous

• Heterogeneous

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Name the separation technique

• Filtration

• Evaporation

• Distillation

• Separation

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True or false: Sieving can be used to separate a mixture with two solid components of different sizes

• True

• False

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Separating sand and gravel is an example of

• Sieving

• Centrifuging

• Decanting

• Filtering

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Name the separation technique

• Distillation

• Crystallisation

• Evaporation

• Condensation

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**It is a technique in which an insoluble solid is separated from a liquid.**

• Filtration

• Sieving

• Decantation

• Use of Magnets

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Which of the following is a pure substance?

• Salt water

• Air

• Gold

• Salad

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Which of the following is a homogeneous mixture?

• Salad

• Salt water

• Sand and iron filings

• Oil and water

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Which method would you use to separate a mixture of sand and salt?

• Filtration followed by evaporation

• Distillation

• Chromatography

• Centrifugation

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Which of the following is a characteristic of a pure substance?

• It can be separated into simpler substances by physical means

• It has a fixed composition

• It is always a mixture

• It has variable properties

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