Why do you only change 1 thing in a lab?

Answer 1

because that one thing will be the variable. if you change more than one thing, the experiment will come out with a different answer because more than one thing is being changed, its like growing two plants, one with miracle grow and one without. you put the one with miracle grow in the sun and is watered often, while the other plant is put in a dark room and watered the same amount. in that situation, the variable is supposed to be the miracle grow but the lack of sunlight on the other plants gives you tainted results.

Answer 2

Changing one variable at a time in a lab allows scientists to understand cause and effect relationships more clearly. This approach helps to determine the specific impact of each variable on the outcome of the experiment, leading to more precise and reliable results. If multiple variables were changed simultaneously, it would be challenging to attribute the observed changes to any specific factor.