Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door of the refrigerator is made of a nonmagnetic substance. What stage of scientific investigation does his guess represent?
Jack already made his observation (magnet doesnt stick). After that Jack then guesses that the fridge was made of nonmagnetic substance. Now he must construct a hypotesis.
