Question

Why are constants important during an investigation

Answer 1

TL;DR: In a science experiment, the controlled or constant variable is a variable that 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.

Answer 2

Control Constants Control constants or control variables are quantities a researcher holds steady during an experiment. Even though the value or state of a control constant may not change, it is important to record the constant so the experiment may be reproduced. Examples: temperature, day/night, duration of a test, pH