Understanding Mixtures and Pure Substances

What is a homogeneous mixture?

• A mixture where the components are not uniformly distributed

• A mixture where the components are uniformly distributed

• A mixture that contains only one type of substance

• A mixture that can be easily separated by physical means

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Which of the following is an example of a homogeneous mixture?

• Sand and water

• Oil and water

• Salt dissolved in water

• Salad

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What is a heterogeneous mixture?

• A mixture where the components are uniformly distributed

• A mixture where the components are not uniformly distributed

• A mixture that contains only one type of substance

• A mixture that cannot be separated by physical means

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Which of the following is an example of a heterogeneous mixture?

• Air

• Vinegar

• Chocolate chip cookies

• Saltwater

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Which of the following best describes a pure substance?

• A material made up of two or more different substances

• A material that has a uniform and definite composition

• A material that can be separated into its components by physical means

• A material that is always a mixture

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

• It can be separated into its components by physical means

• It has a variable composition

• It has a fixed boiling point

• It is always a mixture

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Which of the following is an example of a pure substance?

• Saltwater

• Air

• Gold

• Salad

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Which of the following is NOT a characteristic of a homogeneous mixture?

• Uniform composition throughout

• Components are not easily distinguishable

• Can be separated by physical means

• Components are easily distinguishable

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Which of the following is NOT a characteristic of a heterogeneous mixture?

• Non-uniform composition

• Components are easily distinguishable

• Components are uniformly distributed

• Can be separated by physical means

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Which of the following is an example of a homogeneous mixture?

• Salad

• Air

• Sand and water

• Oil and water

Tags

TEKS.SCI.6.6B