2006-08-25 13:05:44 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology
a controlled experiment only has 1 variable (thing that changes) in it. Everything else, including its environment, is kept constant. For instance, you could change the type of lightbulb in a dark room to see if moths were more attracted to certain types of lightbulbs. The lightbulbs would be the variable. So you would keep everything else--how dark the room was, the temperature of the room, the room itself--the same for each round of your experiment.
2006-08-25 13:16:49 · answer #1 · answered by kacey 5 · 0⤊ 0⤋
It is an idea of changing one factor at a time. With the control experiment, the results are compared between the groups and eliminating the common factors. The results is the directly related to the factor being changed in the experiments and nothing else.
Sorry, I am tired today, I can't articulate further.
2006-08-25 13:22:39 · answer #2 · answered by Anonymous · 0⤊ 0⤋