| A | B |
|---|
| balance | instrument used to measure mass |
| buoyancy | upward force of water or another liquid or air that keeps things afloat |
| circuit | complete path through which electricity can flow |
| conductor | a material through which heat or electricity flows easily |
| current electricity | a moving electrical charge |
| density | amount of matter in a given space |
| diameter | a line segment that goes from one side of the circle, through the center, to the other side |
| force | any push or pull that makes an object start moving, stop moving, speed up, slow down, or change direction |
| gram | unit used to measure the mass of small objects |
| insulator | a material though which heat or electricity does not flow easily |
| mass | the amount of matter making up an object |
| metric unit | a system of measurment based on units of 10 |
| standard unit | a unit of measure like the inch or yard that people agree to use |
