Unit 1a Lesson 2 TEST

A _____________ is a physical combination of two or more substances.

• suspension

• mixture

• matter

• solution

Mixtures that have parts that are not uniformly mixed together are called ___________________ mixtures.

• homogeneous

• heterogeneous

Smoke is an example of a _________ because its suspended particles are small enough that they do not settle.

• colloid

• suspension

• positive

• negative

Explain the difference between a homogeneous and a heterogeneous mixture.

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OFF

Rebecca made a mixture of raisins, nuts, and dried fruit for a snack. Which kind of mixture was Rebecca’s snack?

• solution

• colloid

• heterogeneous mixture

• suspension

When salt is placed in a glass of water and dissolves, it is an example of a ___________________.

• solid

• solution

• aerosol

• gas

While sitting in your house, you notice that there are particles of dust floating in the air. These particles of dust that are suspended in the air are an example of a(n) ________________.

• solid

• solution

• aerosol

• gas

A mixture of gravel and sand is an example of a ________________________.

• heterogeneous mixture

• homogeneous mixture

Which of the following would make sugar dissolve faster in a cup of water?

• Add cold water and stir.

• Let water evaporate away.

• Add warm water and stir.

• Add more sugar and stir.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Mixture or Solution?

• Mixture

• Solution