Pure Substances & Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

Define homogeneous mixture.

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the individual components are not distinguishable.

Front

Define heterogeneous mixture.

Back

A heterogeneous mixture is a mixture where the individual components can be seen and are not uniformly distributed.

Front

What is matter?

Back

Matter is anything that has mass and occupies space.

Front

Give an example of a homogeneous mixture.

Back

An example of a homogeneous mixture is saltwater, where the salt is completely dissolved in the water.

Front

Give an example of a heterogeneous mixture.

Back

An example of a heterogeneous mixture is a salad, where the individual ingredients can be seen and separated.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a pure substance formed when two or more elements are chemically bonded together.

Front

Is lemonade a pure substance or a mixture?

Back

Lemonade is a mixture because it contains water, sugar, and lemon juice that are not chemically combined.