Question

"5) A controlled experiment is one that

A) keeps all variables constant.
B) tests experimental and control groups in parallel.
C) is repeated many times to make sure the results are accurate.
D) proceeds slowly enough that a scientist can make careful records of the results.
E) is supervised by an experienced scientist."

Answer 1

An experiment is a scientific investigation performed under controlled conditions. It involves manipulating variables to see how they affect each other. In a controlled experiment, the researcher sets up an experimental group and a control group.

Step-by-step explanation:

An experiment is a special type of scientific investigation that is performed under controlled conditions. It involves manipulating variables to see how they affect each other. In a controlled experiment, the researcher sets up an experimental group and a control group. The experimental group receives the experimental treatment, while the control group does not. By comparing the results from both groups, the researcher can determine the effect of the independent variable on the dependent variable.