| A | B |
|---|
| scientific notation | a way of expressing a value as the product of a number between 1 and 10 and a power of 10 |
| SCIENTIFIC NOTATION | VERY LARGE OR VERY SMALL NUMBERS EASIER TO WORK WITH |
| INTERNATIONAL SYSTEM OF UNITS | WHAT SCIENTISTS USE AS A SET OF MEASURING UNITS CALLED SI |
| length | the straight-line distance between two points |
| mass | the quantity of matter in an object or sample |
| density | the ratio of an object’s mass to its value |
| conversion factor | a ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit |
| precision | a gauge of how exact a measurement is |
| significant figures | all the digits that are known in a measurement, plus the last digit that is estimated |
| THE PRECISION OF A CALCULATED ANSWER | IS LIMITED BY THE LEAST PRECISE MEASUREMENT USED IN THE CALCULATION |
| accuracy | the closeness of a measurement to the actual value of what is being measured |
| thermometer | an instrument that measures temperature, or how hot an object is |
| volume | the amount of space taken up by an object |
