Friday, May 14, 2010

What are the independent variables, dependent variables, and control in this experiment?

i am seeing out of salt and water, sugar and water and plain water witch one will live the longest and i have no clue what to do when it comes to varibles!What are the independent variables, dependent variables, and control in this experiment?
i am seeing out of salt and water, sugar and water, and plain water witch WHCH one will live the longest and i have no clue what to do when it comes to varibles!





INDEPENDENT VAR: A manipulated (you change it) variable in an experiment or study whose presence or degree determines the change in the dependent variable.








You are chagne tyep type of water.


The outcome is how something lives it is the dependent var. It DEPENDS on the type of water.





Your controls are that the same type of water is used ( all distilled or all bottled) but not sugar + distailled and salt + bottled.





Also the type of organism shouldbe kept the same (size, health etc) as a control.What are the independent variables, dependent variables, and control in this experiment?
control is plain water





independent - type of water





dependent - time of life
I'm going to guess you're growing plants. You might want to specify that next time.





Independant variable: what you put in the water (salt, sugar, nothing)


Dependant variable: life of the plant


control: plain water

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