05. Matter Changes and Properties

Front

What happens to the energy state of products in an exothermic reaction?

Back

The products are at a lower energy state and become more stable.

Front

What defines an element?

Back

An element is defined as only one type of atom.

Front

What is an example of a chemical property?

Back

The ability to burn.

Front

What is a chemical change?

Back

A process that involves one or more substances changing into new substances.

Front

What happens to the mass of a rock when it is broken into smaller pieces?

Back

The mass of the rock will be the same as the total mass of the smaller pieces.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a mixture?

Back

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

Front

What distinguishes a homogeneous mixture from a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition, while a heterogeneous mixture does not.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.