The variables in the above experiment are as follows:
- Independent variable: length of light
- Dependent variable: height of plant
- Experimental group: The plants kept under bright sun lamps all night long
- Control group: Plants not kept under bright sun lamps all night long
<h3>What is an experiment?</h3>
An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.
In an experiment, variables are involved and they include;
- Independent variable; which is the variable that is changed or altered in the experiment
- Dependent variable; which is the variable that is measured or recorded in the experiment
- Control group; the group that does not receive experimental treatment
- Experimental group; the group that receives experimental treatment
According to this question, a student wants to study the effect of sunlight on plant growth. In his experiment, 12 plants receive normal amounts of sunlight, but half of them are kept under bright sun lamps all night long.
This suggests that the following applies;
- Independent variable: length of light
- Dependent variable: height of plant
- Experimental group: The plants kept under bright sun lamps all night long
- Control group: Plants not kept under bright sun lamps all night long
Learn more about experimental variables at: brainly.com/question/20725701
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