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AQA A Biology coursework

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AQA A Biology coursework

Does anyone know if we have to have 3 variables in our A2 cw? I do 4 chemistry and was just wondering if this was goin 2 b the case for bio. Would ask my teacher but i dont have one at the moment

Reply 1

wednesburywench

in ours we do have to change the variable 3 times, eg 3 different phs, temps etc. 3 or 4 my bio teacher sed but atleast 3....

Reply 2

oxymoron

I think how many variables you need depends on the experiment ... but I was always told (for A level coursework) that at least 5 data points were needed in order to get a good graph.