Studies in Science

Relationships Used in Scientific Modeling

When we create a model we need to define the relationships between our variables.

Suppose that we wish to create a model that explains the resulting change in the velocity of an object when we change our pushing force and change the mass of the object. During the course of our class we determine that both Force and Mass have an effect on the accleration of an object, as shown below:

We Need to Now Examine the possible relationships that could be assigned

This means that for each variable, Force and Mass in this case, we need to ask ourselves:

1. Does the acceleration increase or decrease as I change the Force?
2. Does the acceleration increase or decrease as I change the Mass?
3. What type of increase or decrease will I have for each variable?
4. How will I know if I am correct?

About The Same - Notice that the slope of the line is One A Lot - Notice that the slope of the line is much greater than the first graph A Little - Notice that the slope of the line is much flatter than the first graph More and More - Notice that the curve gets steeper and steeper Less and Less - Notice that the curve gets flatter and flatter About The Same - Notice that the slope of the line is Negative One A Lot - Notice that the slope of the line is much more negative than the first graph A Little - Notice that the slope of the line is a less negative than the first graph More and More - Notice that the curve gets steeper and steeper Less and Less - Notice that the curve gets flatter and flatter 