1. What is a Variable?

2. Types of Variables Manipulated Variable The condition that will be changed in an experiment.

3. Responding Variable The condition that will be measured in an experiment. Types of Variables

4. Controlled Variables The conditions that are kept the same (unchanged) in an experiment. Types of Variables

5. Identify variables for the following experiments. You can do it! Practice

6. Does changing the temperature of a ball affect the height the ball will bounce? Testable Question #1 HotCold

7. Manipulated Variable Responding Variable Identify Variables #1 ColdHot Does changing the temperature of a ball affect the height the ball will bounce?

8. Controlled Variables: * Same ball * Dropped from the same height * Dropped onto the same surface * etc… Identify Variables #1

9. Does changing the color of light affect the growth rate of plants? Testable Question #2

10. Manipulated Variable Responding Variable Identify Variables #2 Does changing the color of light affect the growth rate of plants?

11. Controlled Variables: * Same type / size of plant * Same wattage of bulb * Same amount of water * Same soil * Light on for the same amount of time * etc… Identify Variables #2

12. How does the size of a parachute affect the time it takes a toy hippo to fall 10 feet? Testable Question #3

13. Manipulated Variable Responding Variable Identify Variables #3 How does the size of a parachute affect the time it takes a toy hippo to fall 10 feet?

14. Controlled Variables: * Same hippo * Dropped from the same height * Same parachute fabric * Same length of strings on the parachute * etc… Identify Variables #3