Topic 1 Lesson 3- 7th Grade Science

Front

physical change

Back

A physical change alters the form or appearance of matter but does not turn any substances in the matter into a different substance.

Front

chemical change

Back

A chemical change is a change in matter that produces one or more new substances or a chemical reaction.

Front

Law of Conservation of Mass

Back

The Law of Conservation of Mass states that matter is not created or destroyed in any chemical or physical change.

Front

Matter

Back

Anything that has mass and takes up space

Front

Solubility

Back

How easily a substance dissolves in another substance, such as water

Front

Atom

Back

The basic unit from which all matter is made

Front

Elements

Back

Substances that are made up of only one type of atom

Front

molecule

Back

A group of two or more atoms held together by chemical bonds

Front

compound

Back

A substance made of two or more elements that are chemically combined in a set ratio

Front

mixture

Back

Made up of two or more substances that are together in the same place, but their atoms are not chemically combined