7th Grade Unit Chemical Reactions

Match it! Select the correct answer from the pull down...Good luck!

Physical changes occur when existing bonds break, and new bonds form.

A ______ is made up of only 1 type of atom, while a _______ is made up of 2 or more types of chemically bonded atoms

Substances that form as a result of a chemical equation are called

Chemicals that act as biological catalysts by speeding up reactions are

The arrow in a chemical equation represents _____________

A bottle of hydrogen peroxide breaks down into water and oxygen gas. This is an example of what kind of reaction?

CaCO3 represents a chemical

The ___________ is the amount of one material present in a given volume of another material.