Question

you want to experiment if miracle grow will increase your tomato crop. what 3 points are your control variables?
water
whether or not plants get miracle grow
weight or number of tomatoes
sunlight
plants pots
medical experiments often use a placebo. this is
2 points
the experimental group
the fakeo or control group

Explanation:

In an experiment to test if Miracle - grow increases tomato crop, control variables are factors that are kept the same to isolate the effect of Miracle - grow. Water, sunlight, and plant pots can affect tomato growth and should be controlled. Whether or not plants get Miracle - grow is the independent variable, and the weight or number of tomatoes is the dependent variable. In medical experiments, a placebo is given to the control group to account for the placebo effect.

Answer:

1. water, sunlight, plants pots
2. the fake or control group