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Chapter 3 Vocabulary
| Term | Definition |
|---|---|
| Metric System | A system of measurement based on the number 10. |
| SI | A system of units used by scientists to measure the properties of 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 that matter occupies. |
| Meniscus | The curved upper surfaced of 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 has 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 data. |
| Median | The middle number in a set 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 set data. |
| Anomalous Data | Data that do not fit with the rest of a set data. |
| Graph | A picture of information from a data table; shows the relationship between variables. |
| Linear Graph | A line graph in which the data points told a straight line. |
| Nonlinear Graph | A graph line in which the data points do not fall along a straight line, |
| Model | A representation of a complex object or process, used to help people understand a concept that they cannot observe directly. |
| System | A group of related parts that work together to perform a function or produce a result. |
| Input | Material, energy, or information that goes onto a system. |
| Process | A sequence of actions in a system. |
| Output | Material, energy, result, or product that comes out of a system. |
| Feedback | Output that changes a system or allows the system to adjust itself. |
| Safety Symbol | A sign used to alert you to possible sources of accidents in an investigation. |
| Field | Any area outside of the laboratory. |