Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is composed of only one type of matter or element.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not uniformly distributed and can be easily distinguished.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are uniformly distributed and cannot be easily distinguished.

Front

Give an example of a pure substance.

Back

Water is an example of a pure substance.

Front

What happens to the composition of pure substances during a physical change?

Back

The composition of pure substances stays the same during a physical change.

Front

What type of mixture is a salad made of tomato, lettuce, and corn?

Back

A salad made of tomato, lettuce, and corn is a heterogeneous mixture.

Front

What type of mixture is saltwater?

Back

Saltwater is a homogeneous mixture.

Front

What are the two main categories of matter?

Back

The two main categories of matter are pure substances and mixtures.

Front

What is the difference between a compound and a mixture?

Back

A compound is a pure substance formed when two or more elements chemically combine, while a mixture is a physical combination of substances.