Controlled variable ##rArr## have nothing done to it. Constant variable ##rArr## kept the same Dependent variable ##rArr## you observed/measured Independent variable ##rArr## changed
Lets take this scenario, you want to find out how the volume of water watered can affect the growth of the bean sprouts .
So you have 2 pots for this experiment, Pot A and Pot B. With Pot A having a usual volume of ##50ml## watered every time, and Pot B having a higher than usual volume of ##100ml## watered every time.
Independent Variable: The variable that you changed.
- In this case is the volume of water watered .
Dependent Variable: The variable that you observed/measured.
- In this case is the height of the bean sprout .
Constant Variable: The variable that is kept the same throughout the experiment.
-
In this case are:
-
Type of Pots used
- Number of Seeds planted
- Temperature of the surroundings
- Time at which the plants are watered
Of course, there are other variables that should be kept constant, the above 4 are just examples.
Controlled Variable: The variable that have nothing done to it.
- In this case it refers to Pot A , which is the usual pot, no independent variable existed as the volume of water have no change (usual ##50ml##).
