Variables

Worksheet Directions: For each story, identify the independent variable, dependent variables, and controlled variables. 1.) Homer Simpson starts his day late, going to work at the nuclear plant. Mr. Burns gives Homer the dangerous job to test radioactive Uranium reaction to water. Everyone knows that Uranium is very dangerous unless properly handled. Homer not knowing this accepts the job and gets to work. He goes into the lab at the factory and takes out beakers, water, and measuring tools. He measures out 5 mL of water and 5 mL of Uranium to mix together. As he does this, he notices a very strange odor coming from the mixture. He figures the odor is coming from his body and tests it five more times. He tries to complete each trial in two to three minutes observing the mixture for a brief period of time. After he finishes the task, the glowing Homer returns to work looking not well at all. He lies down to take a nap at work. Independent Variable: _ Dependent Variables

Controlled Variables:

2.) Apu the convenience store worker on the Simpsons comes into work. He knows that every morning he needs to get the Slushy machine working properly fast. He quickly rushes into the back room where he takes out five ingredients: water, sugar, red food coloring, sour mix, and ice. He measures each ingredient out to 10 cups each and puts them into the machine. He turns the machine on and dumps the ingredients into the machine and waits 5 minutes for it to start becoming a slushy. After ten minutes nothing is happening in the machine. Independent Variable: _ Dependent Variables

Controlled Variables: __