| A | B |
|---|
| atom | basic building blocks of matter |
| chemical bond | force that holds together atoms in a compound |
| endothermic reaction | reaction that takes in heat |
| exothermic reaction | reaction that releases heat |
| particle theory of matter | particles in constant motion make up all matter |
| product | substance that is produced in a chemical reaction (right side of the arrow in a chemical equation) |
| reactants | a substance that enters into and is changed in a chemical reaction (left side of the arrow in a chemical equation) |
| matter | anything that has mass and takes up space (volume) |
| chemical change | changes from one substance to another |
