How do you identify them? Variables How do you identify them?

Independent Variable What changes in an experiment I can change it = Independent Variable Example: You are testing how different cleaning sprays clean dust. You are changing the cleaning spray (you will use 3 different sprays and see which works best) IV- type of cleaning spray

Dependent Variable What you are measuring/testing for Data = Dependent Variable Example: You are testing how different cleaning sprays clean dust. You are measuring the amount of dust each cleaner picks up DV- amount of dust

Constant Variable What does not change in the experiment Stays constant = Constant Variable Example: You are testing how different cleaning sprays clean dust. You will not change : the area you clean, the time you clean, the time spent cleaning, the amount of time between cleanings If you change any of these your experiment will not be accurate

Try your own! Problem: How does the type of light bulb I use affect the brightness of the room? IV- DV- CV-

Sleeping How does the amount of sleep I get affect my school day? IV- DV- CV-

Tires How does the type of tires I use affect how many miles my car can go? IV- DV- CV-

Hints! When the problem is using the word affect The IV comes before the word affect The DV comes after the word affect How does the type of tires I use affect how many miles my car can go? How does the amount of sleep I get affect my school day?