| Term | Definition |
|---|
| Accelerate | move faster |
| Acceleration | the act of accelerating |
| Average speed | a rate of motion determined by dividing the total distance traveled by the total travel time |
| Conceptual model | a verbal or grapical explanation for how a system works or is organized |
| deceleration | a decrease in speed |
| Dependent variable | the outcome factor; the variable that may change in response to manipulations of the independent variable |
| Free fall | the ideal falling motion of something subject only to a gravitational field |
| graphical model | a model that shows the relationship between two variables on a graph so that the relationship is easily seen and understood. |
| gravity | a force of attraction between objects that is due to their masses |
| independent variable | (statistics) a variable whose values are independent of changes in the values of other variables |
| Instantaneous Speed | the speed of an object at one instant of time |
| Physical Model | a three-dimensional construction designed to explain or represent how something works |
| Scientific Model | "Carefully devised mental conception of how something works, framework that helps scientists think about some aspect of nature. Abstract, mathematical, or mechanical. Not necessary truth. Based on assumptions" |
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