The Scientific Method/Independent and Dependent Variables

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Relationships Between Variables[edit]

In any experiment, the object is to gather information about some event, in order to increase one's knowledge about it. In order to design an experiment, it is necessary to know or make a proposed explanation about cause and effect relationships between what you change in the experiment and what you are measuring. In order to do this, scientists use established theories to come up with a hypothesis before experimenting.

== Isolation of Effects ==pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwdicdicdicdicidcidicidicidicidicidicdicidicidicidiciidicidicidicidicidic Then, do the opposite. You may end up with an experimental scheme like this one:

Test number      Volume Water (fl. oz.)    Temperature (oC)
   1                  4                       20
   2                  2                       20
   3                  8                       20
   4                  4                       5
   5                  4                       50

Once the data is gathered, you would analyze tests number 1, 4, and 5 to get an idea of the effect of temperature, and tests number 1, 2, and 3 to get an idea of volume effects. You would not analyze all 5 data points at once.