What are 3 things that should be kept constant in a experiment?

There must be an independent variable, which changes throughout the course of an experiment; a dependent variable, which is observed and measured; and a controlled variable, also known as the "constant" variable, which must remain consistent and unchanging throughout the experiment.

Explanation:

Controlled or Constant variable

Explanation:

It does not change. For example, in an experiment to test the effect of different lights on plants, other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant.

light dependent reactions:

light independent reactions:

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