PLG 600 Lecture Notes - Lecture 7: Skimmed Milk, Food Coloring, Dependent And Independent Variables
16 Mar 2018
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Plg600 lecture 7: experimental research; nonreactive quantitative research. The key behind a science project is to change only one variable. In the video they experiment with food colouring, milk and soap. The experimenter places a few drops of food colouring into a bowl of milk. He then dips a q-tip into a glass of dish soap and dips that same q-tip into the bowl of milk. What happens is the colours spread, move and mix with one another to create a tie-dye looking effect. The experimenter notes that this movement and effect would not happen if the experiment was done with water instead of milk. He also considers how he might change one of the variables of the experiment to see different outcomes; for example, he might want to use 2% milk or skim milk instead of whole milk to see different results. Independent variable- the soap (which caused the movement)
