It's for my homework..
2007-08-22 13:34:48 · 5 answers · asked by ♥Kristen♥ 3 in Education & Reference ➔ Homework Help
By controlling some variables, you narrow down your research. For example you have 2 plants and you want to show the effects of "Miracle Grow" What you do is control all the variables by using the same type of plant, the same type of dirt, water the same number of times, and expose to the same sunlight. The only thing different (all variables controlled) is the miracle grow added to the water of plant #2. Therefore, when Plant # 2 grows taller or healthier, you know that it's NOT because it had better soil, or more water, or more sunlight or even a stronger plant type. It has to be the miracle grow.....Which also means that if they grow the same with no notable difference, That Miracle grow does not work or does not work on that plant!! Good luck!! I hope I made that simple enough!!
2007-08-22 13:46:31 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You control variables in some experiments, so that you can compare your results. For example if I was testing how water tastes with coloring, I would use a control: Taste water without any coloring, so that I have something to compare to.
HOPE THAT HELPS!!!!! =]
2007-08-22 20:40:18 · answer #2 · answered by Ascending K 3 · 0⤊ 0⤋
we need to ensure that it is only one thing that we're testing. basically, if we have 10 different things changing every time we have a new trial of the experiment, you'll never know what exactly was causing the change in results. The only way you'll know for sure which factor was causing the change is if you only have one changing factor.
2007-08-22 20:54:59 · answer #3 · answered by Sudha M 2 · 0⤊ 0⤋
by controlling varibles it allows you to see what effect the uncontrolled varible has and makes your results much more reliable
2007-08-22 20:47:00 · answer #4 · answered by ~*~ 3 · 0⤊ 0⤋
If you didn't, you could not interpret cause & effect.
2007-08-22 20:39:36 · answer #5 · answered by Robert S 7 · 0⤊ 0⤋