Homogenous and heterogeneous mixtures assessment

What is a mixture?

• A combination of substances that are chemically bonded.

• A combination of substances that are physically combined.

• A pure substance.

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

• Salad

• Saltwater

• Sand and water

Which example best represents a heterogeneous mixture?

• Vinegar

• Oil

• Oil and vinegar

Which separation method is used to remove an insoluble solid from a liquid?

• Filtration

• Evaporation

• Distillation

Which method is typically used to recover a dissolved solid from a liquid?

• Distillation

• Evaporation

• Filtration

What makes a heterogeneous mixture different from a homogeneous mixture?

• A heterogeneous mixture has a uniform appearance.

• A heterogeneous mixture has visibly separate components.

• A heterogeneous mixture consists of only one substance.

Which of the following best describes a salad?

• A homogeneous mixture because all ingredients blend together.

• A heterogeneous mixture because the ingredients remain separate.

• A pure substance made of only one type of material.

What is an example of a homogeneous mixture in the air?

• Dust and smoke particles floating in the air.

• The combination of gases like oxygen, nitrogen, and carbon dioxide.

• Raindrops falling through the sky.

Why do some medicines need to be shaken before use?

• Because they are homogeneous mixtures and need mixing.

• Because they are heterogeneous mixtures, with ingredients that settle over time.

• Because they contain only one ingredient.

Explain what a mixture is.