In an experiment what is a variable?

Answer 1

it is anything you can experiment on in you project

The variable in the experiment allow you to test alternate possible situations and solutions to confirm the validity if the experiment or to disprove it.

Answer 2

A variable in an experiment is a quantity or an attribute whose value may vary over the course of an experiment. There are independent and dependent variables. The independent variable is the one being manipulated by an experimenter. The dependent variable is the the variable upon which the effects of manipulating the independent variable are seen/observed. Example: Independent variable - number of daily calories Dependent variable - weight In an experiment, one may wish to examine the effect of the number of daily calories on weight. Therefore, the experimenter (you) would manipulate the number of daily calories and see the change in weight over the course of weeks/months/years.

Answer 3

In an experiment, there are two types of variables. Dependent variable, and independent variable. The dependent variable is the one that you look at as you alter something else (independent variable). Example you change the amount of light a plant gets, and measure the height the plant grows. The dependent variable is height, and the independent variable is length of light exposure.