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Chapter 3
| Question | Answer |
|---|---|
| Metric System | a system of measurement based on the number 10 |
| SI | a system of units used by scientists to measure the properties if matter |
| Mass | a measure of how much matter is in an object |
| Weight | a measure of the force of gravity acting on an object |
| Volume | the amount of space matter 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 numeral 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 greatest value in a set of data |
| Anomalous Data | data that do not fit with the rest of the 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 strait line |
| Nonlinear Graph | a line graph in which the data points do not fall along in a strait line |