A group of scientists working for company Y want to test a new chemical that they believe will act as a sunscreen and prevent sunburn. the same amount of lotion is applied to each person in the same size area and the test subjects arm is exposed to direct sunlight. the amount of redness is measured every 5 min for a total of the 30 minutes.
for each person tested, 3 different lotions are applied to the test subject's arm:
1. a lotion with the new sunscreen chemical called SunX
2. a lotion with a different active sunscreen chemical that the company currently sells successfully called sun kissed.
3. a lotion that has all the same ingredients as the sunscreen, except it has no active sunscreen chemical

1. what question is being asked in the experiment above ?
2. what hypothesis is being tested in the experiment described above? read entire description above carefully!
3. what is the prediction based on this hypothesis? ( Remember a prediction is written as an " if..., then. .." statement. )
4. A hypothesis must be testable and falsifiable.
A. is the hypothesis you wrote above testable? explain.
B. is the hypothesis you wrote above falsifiable? explain.

6. A. what is the independent variable in this experiment? why?
B. what is the dependent variable in this experiment? why?
7. A. for this experiment, which group of patients is the experimental group (1,2 or 3)? why?
B. which group of patients is the negative control (1,2 or 3)? why?
C. which group of patients is the positive control (1,2 or 3) why?