Pure Substances and Mixtures Flashcard

Front

What is a pure substance?

Back

A material that has a constant composition and consistent properties throughout.

Front

What is a mixture?

Back

A combination of two or more substances where each retains its own properties.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition and appearance throughout.

Front

What is a heterogeneous mixture?

Back

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

Front

What is a solution?

Back

A homogeneous mixture formed when one substance dissolves in another.

Front

What is a suspension?

Back

A heterogeneous mixture where solid particles are suspended in a liquid but will settle over time.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity.

Front

What is a chemical property?

Back

A characteristic that can only be observed during a chemical reaction, indicating how a substance interacts with other substances.

Front

What happens to gas particles when heated?

Back

They move faster and spread further apart, increasing the volume.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.