1. Variables

2. What are they? Any factor in an experiment Can be changed…
…or kept the same.

3. Controls
Variables that are kept the same throughout the experiment.

4. Controls
Variables that are kept the same throughout the experiment.

5. Manipulated Variable AKA Independent variable
The variable you CHANGE in order to test your question.

6. Responding Variable AKA Dependent variable The variable you MEASURE.
It changes in response to the manipulated variable.

7. IF manipulated variable, THEN responding variable BECAUSE why
Writing Hypotheses
IF manipulated variable, THEN responding variable BECAUSE why

8. How to Graph
Y Axis
X Axis

9. How to Graph Manipulated Variable (Independent) Responding Variable

10. How to Graph DRY Y Axis Responding Variable (Dependent)
Manipulated Variable
(Independent)
X Axis

11. How to Graph DRY MIX Manipulated Variable (Independent) X Axis
Responding Variable
(Dependent)
Y Axis
Manipulated Variable
(Independent)
X Axis

12. Review
You watch your neighbor wash his car one day and notice soapy water running down the driveway and into a bed of flowers. You decide you want to study the effects of soap on flower growth. What is the independent variable? What is the dependent variable?  
Amount of soap (mL) 
Flower height (cm)  0 
18  1 
16  2 
10  3  7  4 

13. You want to create a graph of the amount of rainfall Greensboro received every year for the last 10 years. Below is your data. What is the independent variable? Dependent variable? Draw and label the axes for this graph. Create a title.