One. If there is only one variable being tested, when you compare it to the control, you know that was the cause of a change.
No, a hypothesis is. A variable is the thing being tested in the experiment.
variable
the independent variable
Independent variable ! :)
The dependant variable is what is tested in an experiment.
Controlled Experiment :]
The tested variable is whether or not things rose spontaneously from the broth.
The Independent variable
The independent variable.
A factor that changes in an experiment is called a dependent variable. It is the variable that is being tested.
the independent variable
the independent variable