| A | B |
| melting | the change of state from a solid to liquid |
| freezing | the change of state from a liquid to a solid |
| evaporation | change of state from a liquid to a gas |
| condensation | change of state from a gas to a liquid |
| sea water | a common solution found in nature |
| solution | matter in which particles of different substances are mixed evenly throughout |
| mixture | matter made of two or more substances |
| physical change | change in matter where no new matter is formed |
| chemical reaction | process in which new matter is formed |
| chemical property | describes how matter reacts with other matter |
| substances | large class of matter including elements and compounds |
| formation of a new solid | evidence of a chemical reaction |
| theory | a scientific idea |
| oxygen | example of a gas |
| a nail that has rusted | example of a chemical change |
| trail mix | an example of a mixture |