| A | B |
| Matter | anything that has mass and takes up space |
| Mass | the amount of matter in an object |
| kilogram | the standard unit used to measure mass |
| weight | the downward pull of Earth's gravity on an object |
| scale | the standard unit of measure for weight |
| newton | the standard unit of measure for weight |
| volume | the amount of space occupied by an object |
| beam balance | tool used to measure mass |
| graduated cylinder | tool used to measure volume of a liquid |
| atom | the smallest basic unit of matter |
| molecule | two or more atoms bonded together |
| element | a substance with only one type of atom |
| compound | a substance with atoms of more than one type bonded together |
| mixture | a combination of one or more substances that can be separated physically |
| solid | a substance with a fixed volume and a fixed shape |
| liquid | a substance with a fixed volume but no fixed shape |
| gas | a substance with no fixed volume and shape |
| states of matter | the different forms in which matter can exist |