Question

A scientist who wants to study the affects of fertilizer on rose plants sets up an experiment. Plant A gets no fertilizer, Plant B gets 5 mg of fertilizer each day, and Plant C gets 10mg of fertilizer each day. The rose plants are measured each week and they all get the same amount of light and water. Match the parts of this experiment to the correct variable/group.

Answer 1

Control Group: Plant A (no fertilizer)

Independent Variable: Fertilizer

Dependent Variable: Growth of rose plants

The control group is Plant A, which receives no fertilizer. This provides a baseline to compare the results from the other groups. The independent variable is fertilizer, as it is the factor that the scientist is varying in order to observe its effects on the rose plants. The dependent variable is the growth of the rose plants, as this is what the scientist is measuring in order to see the effects of the fertilizer.