1. CONTROLS AND VARIABLES Biology

2. Vocabulary Control The variable or group that stays the same, is unaltered. Independent (Manipulated) Variable The variable or group that is changed by the experimenter. Dependent (Responding, Measured) Variable The variable that responds to the independent variable.

3. Example Question: Which video game causes the highest level of stress? Hypothesis: If people play Call of Duty, then they will have the highest level of stress compared to Pokemon Snap, Mario Smash Bros., and Tetris.

4. Find the Control and Variables Experiment: 10 people play each type of video game for 1 hour in same room. 2 people sit in room in front of tv with no video game. We measure their stress level. Call of Duty stress levels were 10% higher than the other games. Control group: 2 people not playing video games Independent Variable: Type of Video game Dependent Variable: Level of Anxiety

5. Answer choices: a)The Special Drink increases the productivity of workers b)The Special Drink decreases the productivity of workers c)The Special Drink d)Group A (given special drink) e)Group B (not given special drink) f)Productivity of workers (# of stacks of papers)

6. Answer choices: a)The ½ of the shower he sprays with coconut juice b)The ½ of the shower he sprays with water c)Type of liquid used d)Coconut juice e)There is green slime in the shower! f)Green Slime g)Coconut Juice gets rid of green slime h)Coconut Juice does not get rid of green slime i)The whole shower

7. Answer choices: a)Strength of the mice (ability to push block) b)Exposure to radiowaves c)The 10 unexposed mice d)The radiowave-exposed mice e)Bart

8. Identify: 1.Control Group- 2.Independent Variable- 3.Dependent Variable- 4.Explain whether data supports the ad’s claim about this product.

9. Group Task 1.Design Lisa’s Experiment Be sure to identify: -Control group -Independent variable -Dependent variable