shorthand form for writing what reactants are used and what products are formed in a chemical reaction; sometimes shows whether energy is produced or absorbed.

process that produces chemical change, resulting in new substances that have properties different from those of the original substances.

chemical reaction in which heat energy is absorbed.

catalysts that are large protein molecules which speed up reactions needed for your cells to work properly.

chemical reaction in which heat energy is released.

substance that forms as a result of a chemical reaction.

measure of how fast a chemical reaction occurs.

substance that exists before a chemical reaction begins.

1. Isooctane + oxygen forms àwater + carbon dioxide + energy

Name the reactants of this word equation.

1. By balancing a chemical equation, you change or add the ______________________.

1. A __________ is a number that shows the number of atoms in each element.

1. ________________________ is a state in which a reversible chemical reaction is proceeding in both directions equally. A chemical equilibrium is shown with two arrows going in opposite directions.

1. There are three effects of change in an equilibrium are temperature, _____________________, and concentration.

If you increase the ________________________ favors the reaction to absorb energy.

Which enzyme breaks down cellulose into smaller molecules?

A balanced equation tells you the _________ __________, or proportion of reactants and products, in a chemical reaction.

__________________ are catalysts in chemical reactions used in living things. You can identify enzymes by their suffix ending in "ase."

If a change is made to a system in chemical equilibrium, the equilibrium shifts to oppose the change until a new equilibrium is reached. This is known as _______________________ ___________________.

The ___________________________________ states that matter cannot be created or destroyed. Matter is transferred from one state to another. Example is melting ice from solid to liquid.