1. Independent Variable (IV)
Dependent Variable (DV)
Varied or Manipulated
Response Measured
Cause
Effect
Controlled by experiment
Observed for Result
Control
No change is made
Observed and Compared to results from IV

2. For each example, identify the IV and DV
How does the speed of wind affect the size of a wave?
A teacher wants to know if the amount of homework assigned affects test scores?
Is the growth of plants related to gravity?
Are bats attracted to different geographic features?

3. Does eating breakfast affect school performance?
Are freckles related to how much sun a person absorbs over time?
A scientist wants to test how altitude affects the amount of oxygen that a human is able to absorb into their bloodstream
Does eating breakfast affect school performance?