controlled experiment :D
It's called a 'fair test'
It's called a controlled experiment.
Environmental factors if you cannot control them.Variable factors if you can control them.See link below for easy explanation:In an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpufIn an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpuf
So the variable can be at constant.
the investigator only changes one variable in an experiment because they need to see how that one variable reacts. if you wanted to see how the dependent variable changed but changed the independent variable you would not see how the one variable reacts.
Controlled
Controlled Experiment :Pcontrolled experiment.
a controlled experiment must have only one manipulated variable becuase if the experiment had multiple manipulated variables then it would not be a controlled experiment anymore it would be a manipulated Deseret experiment
controlled experiment
Controlled experiment
Controlled Experiment :Pcontrolled experiment.
manipulated variable
only 1 parameter, or, variable, is manipulated at a time
Controlled Experiment :Pcontrolled experiment.
An experiment with only one independent variable (manipulated part). All of the other variables are kept constant throughout the trials of the experiment.
Fifteen turtles are fed iceberg lettuce and vitamins, while another fifteen turtles are fed only iceberg lettuce
um varible i think now