| Term | Definition |
|---|---|
| Mean | The sum of the number in a set of data divided by the number of items in the set. |
| Median | The middle number in a data set when the data is arranged in numerical order. |
| Mode | The number that appears most often in a data set. |
| Range | The difference between the highest and lowest values in a data set. |
| Controlled experiment | A scientific experiment that involves changing one factor and observing its effect on one thing while keeping all other things constant. |
| Independent variable | The variable that is changed in an experiment. |
| Dependent variable | The variable that changed as a result of a change in the independent variable. |
| Scientific method | A series of steps that scientists use when performing an experiment. |
| Hypothesis | An explanation that can be tested with a scientific investigation. |
| Data | Information gathered during an investigation; recorded in the form of descriptions, tables, graphs, or drawings. |
| Conclusion | A statement about whether or not the hypothesis is valid based on the data collected. |
| Quantitative data | Descriptions of the natural world using numbers. |
| Qualitative data | Descriptions of the natural world using words. |
