Question

overnight to stop ice from forming.
one winter night, julia secured a plastic bag over one of the side mirrors on her car. she left the other side mirror uncovered. in the morning, she checked the percentage of each mirror that was covered by ice. julia repeated this test every night for one week, alternating which mirror she covered each night.
complete the sentence.
in this experiment, the covered side mirrors were part of ______.
a control group
an experimental group

Explanation:

In a scientific experiment, the experimental group is the set of subjects exposed to the variable being tested. Here, the plastic bag (the intervention to prevent ice) is applied to the covered mirrors, making them the group being tested against the uncovered (control) mirrors.

Answer:

an experimental group