Pure Substances and Mixtures

Which of the following is a pure substance?

• Saltwater

• Oxygen gas

• Salad

• Sand and iron filings

Which of the following is a homogeneous mixture?

• Oil and water

• Air

• Sand and gravel

• Salad

Which of the following is a heterogeneous mixture?

• Vinegar

• Saltwater

• Salad

• Sugar solution

Which of the following best describes a solution?

• A mixture where the components are easily distinguishable

• A mixture where the components are uniformly distributed

• A pure substance

• A mixture of solids

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

• Milk

• Carbon dioxide

• Soil

• Orange juice

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

• Uniform composition

• Components are not easily distinguishable

• Can be separated by physical means

• Components are easily distinguishable

Which of the following is a characteristic of a heterogeneous mixture?

• Uniform composition

• Components are not easily distinguishable

• Components are easily distinguishable

• Cannot be separated by physical means

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

• Salad

• Saltwater

• Sand and iron filings

• Oil and water

Which of the following is a pure substance?

• Air

• Water

• Soil

• Milk

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

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

• Vinegar

• Air

• Sand and gravel

• Saltwater