Melinda was cooking a pizza and removed the pizza from the oven, which was set to 204 degrees Celsius. She wanted to cool down the pizza as quickly as possible to eat it. In her house, she had a freezer (set to -18 degrees Celsius), a refrigerator (set to 4 degrees Celsius), and the countertop (which is at the temperature of the room, 25 degrees Celsius).
Design an experiment that will let Melinda study which of the three options, the refrigerator, the freezer, or the room, will let the pizza cool down the fastest. In your experiment design, be sure to describe: The independent variable, the dependent variable, the controlled variables and your procedure.