DESIGNING GOOD EXPERIMENTS VARIABLES Any part of an

DESIGNING GOOD EXPERIMENTS

VARIABLES Any part of an experiment that can change. What are some of the variables in Mr. Hott and Dr. Smooth’s experiment?

THERE ARE 3 KINDS OF VARIABLES IN EVERY EXPERIMENT… 1) Independent Variables- (IV)the variable that the experimenter changes on purpose. This is what is being tested! What should the independent variable be in Mr. Hott and Dr. Smooth’s experiment? The type of coin!

THERE ARE 3 KINDS OF VARIABLES IN EVERY EXPERIMENT… 2) Dependent Variables- (DV) The variable that is measured to show what happened. What is the dependent variable in Mr. Hott and Dr. Smooth’s experiment? The number of drops that fit on each coin. CREEPY!

THERE ARE 3 KINDS OF VARIABLES IN EVERY EXPERIMENT… 3) Controlled Variables- (CV) The variables that are kept the same (not changed) on purpose. What are some controlled variables in Mr. Hott and Dr. Smooth’s experiment?

FOR YOUR EXPERIMENT TO WORK, YOU CAN ONLY CHANGE ONE INDEPENDENT VARIABLE AT A TIME. WHY? ? You have to know WHAT is causing the change in the Dependent Variable

LASTLY, Good experiments are never performed only one time! Multiple trials should be done to assure that the data you collect is valid!

SO…. How can you make Mr. Hott and Dr. Smooth’s experiment better? Work with your partner to make a plan to perform this same experiment tomorrow, but do a better job!