| A | B |
| mass | the amount of material that an object has in it |
| volume | amount of space that matter takes up |
| atom | the smallest whole bit of an element |
| element | matter that has only one kind of atom |
| compound | a substance formed when atoms of two or more different elements join together |
| molecule | two or more atoms held together in a special way |
| mixture | two or more substances that are placed together but can be easily seperated |
| solution | mixture in which one substance spreads evenly throughout another substance |
| meter | a unit for measuring length |
| centimeter | 1/100 of a meter |
| millimeter | 1/1000 of a meter |
| kilometer | 1000 meters |
| cubic meter | a unit for measuring volume |
| liter | a unit for measuring volume |
| milliliter | 1/1000 of a liter |
| graduated cylinder | a piece of equipment used for measuring the volume of liquids |
| kilogram | unit for measuring mass |
| gram | 1/1000 of a kilogram |
| milligram | 1/1000 of a gram |
| density | how much mass is in a certain volume of matter |