| A | B |
|---|
| chemical reaction | process in which substances change to make one or more new substances |
| precipitate | a solid that is produced as a result of a chemical reaction in solution |
| signs of chemical reactions | color change, formation of a gas or a solid, and release of energy |
| chlorophyll | green pigment in leaves that changes in fall, indicates chemical reaction |
| gas given off when water is boiled | physical change not chemical change |
| chemical bond | a force that holds two atoms together in a molecule |
| during a reaction | bonds are broken, atoms are rearranged, and new bonds are formed |
| materials formed after a chemical reaction | have different properties from original materials |
