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Noob1314

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What is the advantages and disadvantages of :

controlling variables, achieving reliability and using controls?

I basically discussed how it was useful and also provided experiment examples but I also would want to talk the disadvantages of the fair testing in Science.
 

iRuler

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What is the advantages and disadvantages of :

controlling variables, achieving reliability and using controls?
Controlling Variables: Adv: Provides Validity to the experiment
Dis Adv: (As Stated time consuming), maybe expensive?

Reliability: Adv: Provides results that can be trusted do to repeating
Dis Adv: Experiment needs to be conducted numerous times to see if results are constant and reliable.

Controls: Adv: Something to compare to, which has no independent variables
Dis Adv: Extra Work, Waste of Time, Waste of Money.


Can I also ask- HOW do you control the variables?
Something Like this:

to keep it constant (eg. 10cm, 20cm, 30cm, etc) or keep it into a same stage (e.g. soild, liquid, gas)
Also, using the same equiment, time keeper (to minimise errors), same place where experiment is conducted, same mass of weight, basically same everything other than what you're testing (dependent variable) through the thing you're testing with (independent variable).
 

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