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chapter 3
| Term | Definition |
|---|---|
| metric system | A system of measurement based on the number 10. |
| SI ( International system of units) | A system of units used by scientists to measure the properties of matter. |
| mass | A measure of how much matter is in a object. |
| weight | A measure of the force of gravity acting on an object. |
| volume | The amount of space matte occupies. |
| meniscus | The curved upper surface of a liquid in a column of liquid. |
| density | The measurement of how much mass of a substance is contained in a given volume. |
| estimate | An approximation of a number based on reasonable assumptions. |
| accuracy | How close a measurement is to the true or accepted value. |
| precision | How close a group of measurements are to each other. |
| significant figures | All the digits in a measurement that have been measured exactly, plus one digit whose value has been estimated. |
| percent error | A calculation used to determine how accurate or close to the true value an experimental value really is. |
| mean | The numerical average of a set of data. |
| median | The middle number in a set of data. |
| mode | The number that appears most often in a list of numbers. |
| range | The difference between the greatest value and the least value in a set of data. |
| anomalous data | Data that do not fit with the rest of a data set. |
| graph | A picture of information from a data table shows the relationship between variables. |
| linear graph | A line graph in which the data points yield a straight line. |
| nonlinear graph | A line graph in which the data points do not fall along a straight line. |
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