1. Sponge Bob – Controls and Variables
When the IV is not changed but has other factors of the experiment.
Variable:
Any portion of the experiment that can have more than one value.
IV:
What you are testing/changing.
DV:
What you are measuring.

2. Krusty Krab Breath Mints:
Group B is the control because they did NOT receive the secret ingredient.
IV = secret ingredient
DV = amount of bad breath
The breath mint with the secret ingredient appears to reduce the amount of breath odor more than half the time, but it is not 100% effective.
Placebo effect

3. Squidward’s Symphony IV = instrument DV = number of jellyfish
Conclusion:
Clarinet = 37,
Flute = 22,
Guitar = 37,
No music = 10
Squidward’s hypothesis is not proven.
Are the results reliable?
Not really . . .

4. Super Bubbles Claim: Bubbles will be twice as big.
IV = type of bubble solution
DV = size of the bubble
Averages
Super bubble = 15.1 cm
Regular soap = 11.5 cum
Conclusion: The bubbles are bigger, but not twice as big.
Reliable?
Consider having the each person blow 5 bubbles with each solution.

5. Sponge Bob Clean Pants
The problem is Sponge Bob’s pants are not clean.
IV = laundry soap
DV = How clean the pants are
Clean-O laundry soap does not appear to be effective in cleaning his pants.