MIXTURES

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What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Tags

NGSS.MS-PS1-4

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What is a mixture?

Back

A mixture is a combination of two or more substances that can be physically separated and do not have a fixed composition.

Front

What is a compound?

Back

A compound is a pure substance formed when two or more elements are chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not distinguishable.

Front

What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the different components can be seen and are not uniformly distributed.

Front

Give an example of a homogeneous mixture.

Back

Freshly brewed black coffee is an example of a homogeneous mixture.

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Give an example of a heterogeneous mixture.

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Fruit salad is an example of a heterogeneous mixture.

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How can mixtures be separated?

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Mixtures can be separated using physical methods such as filtration, distillation, or evaporation.

Front

What is the difference between a mixture and a compound?

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A mixture is a physical combination of substances that can be separated, while a compound is a chemical combination of substances that cannot be separated by physical means.

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What is a solution?

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A solution is a type of homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).