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Without a control and variable you can not say what caused any results, and you can not know if the results would have been the same without factors from the experiment. You need a control and variable for comparison purposes also.

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16y ago
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12y ago

These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.

Experiments also have controlled variables. Controlled variables are quantities that a scientist wants to remain constant, and he must observe them as carefully as the dependent variables. For example, if we want to measure how much water flow increases when we open a faucet, it is important to make sure that the water pressure (the controlled variable) is held constant. That's because both the water pressure and the opening of a faucet have an impact on how much water flows. If we change both of them at the same time, we can't be sure how much of the change in water flow is because of the faucet opening and how much because of the water pressure. In other words, it would not be a fair test. Most experiments have more than one controlled variable. Some people refer to controlled variables as "constant variables."

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14y ago

Variables are things such as temperature, pressure, concentrations etc and an alteration of any of these effect an experiment. For example if you place a piece of Magnesium in the open air nothing much wil happen even over a long period of time. However if you heat the Magnesium sufficiently it will then burn in the presence of the Oxygen in the air, with a brilliant white flame. The end result will be a the production of Magnesium oxide which is a greyish/white power.

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15y ago

Control means a factor which remains the same and doesn't change while variable is the other thing which can vary according to situation.

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12y ago

By finding a new answer experimenting again.

P.s this question was in my test as well.

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15y ago

it will change the outcome of comparibles.

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9y ago

The effect of using both a variable and a control in any experiment is simple. You will have one thing that isn't tested on and one that is so that you can see the difference.

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12y ago

The variables make the experiment more controlled

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Q: What is a variable and a control?
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Related questions

What is control variable and manipulated variable?

a control variable is a variable that needs to be controlled


What are the similarities between a control and a variable?

There are not any similarities between a control and a variable. However, a Control Variable, is a variable.


What do controlled variable do?

You can control it that's why its called control variable.


What is a control variable in research studies?

A control variable is a variable that is held constant in a research analysis.


What is the difference between a control variable and a control treatment?

what is the difference between a variable and a control


Is a variable that stays the same a constant independent variable or control?

Control


How do you control one variable at time?

who to control one variable at time


What is the difference of a dependent variable and an independent variable?

An independent variable is when you do not control what happens In an experiment,however; a dependent variable is when you actually control the experiment,


What is the difference of independent variable and a dependent variable?

An independent variable is when you do not control what happens In an experiment,however; a dependent variable is when you actually control the experiment,


The variable that you control?

xh


Why is important to control variables in an experiment?

So that you can know what is the manipulating variable, the controlling variable, and the responding variable! To control the variables!


What is the independent variable in a controlled experiment?

The variable that affects the dependent variable. It is the variable that you control.