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| Term | Definition |
|---|---|
| metric system | decimal system of units based on the meter as a unit length, the kilogram as a unit mass, and the second as a unit time. |
| length | the distance from point to point. |
| mass | amount of mater contained in an object. |
| volume | space matter occupies. |
| meter | (m) metric standard for line measure;unit of distance |
| liter | basic unit of volume |
| gram | unit of mass |
| weight | force created by the response of mass to the pull of gravity; measure of the heaviness of an object |
| gravity | natural force of attraction between any two massive bodies, which is directly proportional to the product of their masses ans inversly proportional to the square of the distance between them. |
| scale | is an intrument to measure an object's weight in Newtons (N) |