| A | B |
|---|
| Law of conservation of mass | Matter can NOT be created or destroyed during a chemical reaction. The mass of the products is equal to the mass of the reactants. |
| Activation energy | energy required to get a reaction to start. |
| Products | materials produced during a chemical reaction |
| reactants | materials present at the start of a chemical reaction. |
| Chemical equation | description of a chemical reaction using symbols and/or words. |
| Exothermic reaction | chemical reaction that releases energy in the form of heat. |
| Endothermic reaction | Reaction that absorbs energy, therefore it feels cold. |
| Precipitate | a solid formed when two liquids react |
| Chemical reaction | when bonds are broken and new bonds are formed, creating new and different materials. |
