In designing an experiment all the variables except the ..... variable should be held constant.

PHYSICAL SCIENCES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

In designing an experiment all the variables except the ____ variable should be held constant.

A	treatment or independent
B	control
C	constant
D	dependent

Explanation:

Detailed explanation-1: -In experiments, researchers manipulate independent variables to test their effects on dependent variables. In a controlled experiment, all variables other than the independent variable are controlled or held constant so they don’t influence the dependent variable.

Detailed explanation-2: -A properly designed experiment usually has three kinds of variables: independent, dependent, and controlled.

Detailed explanation-3: -In a “controlled experiment”, why must all of the variables, except one, be kept constant throughout the experiment? If several variables were changed at the same time, the scientist would not know which variable was responsible for the observed results.

Detailed explanation-4: -Control variables are held constant or measured throughout a study for both control and experimental groups, while an independent variable varies between control and experimental groups.

Detailed explanation-5: -There are three main variables: independent variable, dependent variable and controlled variables.

There is 1 question to complete.