Design an experiment that would directly test the hypothesis of the following scenario. Identify the control group, independent variable, and dependent variable. Hypothesis: The plant species Acidicus plantus grows best at pH 2-4.

My experiment would consist of two different treatments: pH 2-4  and pH 5-7.

In this case:

- Control group: Acidicus plantus plants growing in different conditions (pH 5-7)

- Independent variable: pH  

- Dependent variable: plant growth  

Explanation:

A control group is a group in which the effects of a given treatment are unknown, so the control group can be used to compare with the experimental group. In this case, Acidicus plantus plants growing in different conditions can be used as the control group, since this group can be used to measure the effects of the treatment. The dependent variable is the variable that is being measured in the experiment (in this case, plant growth), while the independent variable is the variable that isn't modified by the other variables measured in the experiment (in this case, pH).

the index of refraction of the second medium is higher. i just took the test trust me !