| A | B |
| Atom | The smallest chemical unit of matter |
| Molecule | Two or more atoms linked together to make a substance with unique properties |
| Concentration | The quantity of a substance within a certain volume |
| the base metric unit for length | meter |
| the base English unit for length | foot |
| the base metric unit for mass | gram |
| the base English unit for mass | slug |
| the base metric unit for weight | Newton |
| the base English unit for weight | pound |
| the base metric unit for volume | liter |
| the base English unit for volume | gallon |
| the base metric unit for temperature | degrees Celsius |
| prefix meaning .01 | centi |
| prefix meaning .001 | milli |
| prefix meaning 1000 | kilo |