Presentation on theme: "Sponge Bob – Controls and Variables"— Presentation transcript:
1Sponge 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.
2Krusty Krab Breath Mints: Group B is the control because they did NOT receive the secret ingredient.IV = secret ingredientDV = amount of bad breathThe 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
3Squidward’s Symphony IV = instrument DV = number of jellyfish Conclusion:Clarinet = 37,Flute = 22,Guitar = 37,No music = 10Squidward’s hypothesis is not proven.Are the results reliable?Not really . . .
4Super Bubbles Claim: Bubbles will be twice as big. IV = type of bubble solutionDV = size of the bubbleAveragesSuper bubble = 15.1 cmRegular soap = 11.5 cumConclusion: The bubbles are bigger, but not twice as big.Reliable?Consider having the each person blow 5 bubbles with each solution.
5Sponge Bob Clean PantsThe problem is Sponge Bob’s pants are not clean.IV = laundry soapDV = How clean the pants areClean-O laundry soap does not appear to be effective in cleaning his pants.