Questions: For the following 3 experimental set-ups, identify the independent variable, dependent variable, a few controlled variables, and then write a valid hypothesis for the experiment. -Justin is growing a garden and has many different types of liquids with which he could water his plants. He has water, coffee, milk, and fertilizer dissolved in water. He wants to know which liquid will help his tomato plants grow the best. Independent variable: Dependent variable: Controlled variables: Hypothesis: