The ____ variable is the variable that is purposefully changed in an experiment. The ____ variable is the variable that is measured at the end of the experiment. The ____ variables are the variables that are held constant during the experiment. Johnny wanted to see if drinking Gatorade would increase the speed of his running. He ran 200m without drinking any Gatorade and measured his speed. He then drank a bottle of Gatorade and ran another 200m. The ____ variable in this experiment is the speed of Johnny's running. The ____ variable is whether he drank the Gatorade or not. A ____ variable is the 200m distance. Sally wanted to see if different liquids had different boiling points. She heated each liquid using a Bunsen burner for 20 minutes to see at what temperature they started to bubble. The ____ variable in this experiment is the different liquids tested. The ____ variable in this experiment is the boiling point of each liquid. A ____ variable is the time period of 20 minutes of heating. Nick wanted to see if the amount of fertiliser given to a plant affects its growth. He purchased five identical seeds and placed them in five identical pots. He put some soil in each pot. In the first pot, he placed 0 grams of fertiliser. In the second pot, he placed 10 grams of fertiliser. In the second pot, he placed 20 grams of fertiliser, and so on. He measured the growth of the plants after five days. A ____ variable is the ____. The ____ variable is the amount of fertiliser given to the plants. The ____ variable is how much the plants grew.

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