Question 1: Define the terms hypothesis, independent variable, dependent variable, and a controlled variable in your own words.
Question 2: We discussed the importance of having only one independent variable, but trying to test more than one independent variable is an error many people make. In the following experiment, identify the errors that the experimenter made and summarize a valid way to test his research question: What cooking spray best keeps food from sticking to a pan? In the morning, Dan uses grapeseed oil to cook eggs for breakfast; for lunch, he uses vegetable oil spray to coat a muffin tray and cooks cornbread to eat with his chili; for dinner, he uses olive oil to pan cook a hamburger patty.
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