What is a 'control' in a science experiment?

Question

What is a 'control' in a science experiment?

Answer 1

its what everything else in the experiment gets compared to & it dosnt change. if you didnt have it the experiment wouldnt make any sense because you would be testing it with no info on how 2. & the varrible is what is being changed in the experiment.

Answer 2

Something where you do not alter any of the variables. This gives you a baseline to measure other results against.

If you wanted to see the effect of dieting on people, you could put three on one diet, three on another, and three who didn't change their eating habits.

The unchanged three are your control, and you would then be able to see if your diets actually had any effect.

Answer 3

a controled experiment  is making sure that you only test one variable at a time when using the scientific method.

observe

question

hypothesis

experiment

record

conclude

thats what i learned

the control is the common factor used a a base.

Answer 4

The one trial that you do normally.

Like, if you were testing which liquid grows plants better, water would be the control because its what we normally use and we know it works.  You compare the other trials to the control to see how they improved or hurt the plant.

Answer 5

the person that is being fooled

Answer 6

It is a separate group where all variables are known and predictable.

A group where the factor being tested is not being applied so it can be compared to the group where the factor is being applied.

Answer 7

a thing that undergoes avery variable except the independant variable (the one being investigated) to make sure that it is this factor causing the change.

Answer 8

when your testing something, its the part that doesn't change. usually the part that has a result already known for example:

If i wanted to know what color light plants grow  best in. I would  choose red light, blue light yellow ect.  My control would be sunlight.  Which is actually a collection of all light.  

I would compare how plants grow in different colors to something that was natural like the sun (the control).  

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Answer 9

the separate group that u use to compare to the group that ur changing for example:

if ur growing plants with soda, the control wuld b the group of plants growing with water normally

the noncontrol wuld b the group of plants watered with soda. u compare the control group with the group ur testing