Pure Substances & Mixtures

Front

What is a pure substance?

Back

A pure substance is a material made up of only one type of atom (element) or compound.

Front

Give examples of pure substances.

Back

Examples of pure substances include water, sugar, and gold.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.

Front

What are elements?

Back

Elements are pure substances that consist of only one type of atom.

Front

What are compounds?

Back

Compounds are pure substances formed when two or more elements are chemically bonded together.

Front

True or False: All mixtures are pure substances.

Back

False. Mixtures contain two or more substances.

Front

What method can be used to separate a mixture of sand and iron filings?

Back

Magnetism can be used to separate sand and iron filings.

Front

What is distillation?

Back

Distillation is a method used to separate components of a mixture based on differences in boiling points.