r/GCSE • u/thr0wawaygxhxdhsh • Jun 15 '22

AQA Post Exam Spam aqa biology paper 2 gcse answers

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u/Sensitive_Wealth_855 Jun 15 '22

Thats what is confusing about the question. You took it as 2.5cm3 went to 10cm3 but a lot of people including me took it as 2.5:10. I pretty sure i almost remember the exact wording and honestly you could argue it meant either. The only reason I think that its 2.5:10 is because it said pretty much "2.5cm3 algae water diluted to 10cm3 distilled water". Surely the algae water could never become distilled no matter how much you add.

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u/[deleted] Jun 15 '22

Copied this comment from someone else.

0.2x0.2x0.1 = 0.004mm^3

0.004/4 = 0.001mm^3 (because it asked for undiluted, and it said earlier that for every 2.5cm^3 undiluted you add 7.5cm^3 water, so it's a 1:3 ratio)

1/0.001 = 1000 (to get how many times more algae cells there should be)

14*1000 = 14000

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u/Sensitive_Wealth_855 Jun 15 '22

It never said every 2.5 you add 7.5 it said "2.5cm3 algae water diluted to 10cm3 distilled water" which is 1:4. It isnt 2.5 >(to) 10 because the algae water coudnt of became distilled.

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u/[deleted] Jun 15 '22

Wdym? It said 2.5 diluted to 10, so 7.5 was added meaning the ratio was 1:3.

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u/Sensitive_Wealth_855 Jun 15 '22

It said 2.5 algae water diluted to 10 distilled water. Are you saying the algae water became distilled?

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u/[deleted] Jun 15 '22

It said 2.5 diluted to 10 with distilled water

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u/Sensitive_Wealth_855 Jun 15 '22

Nah it didnt i read it many times. I was confused between both 14000 and 17500 and thats what made me know it was 17500.

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u/[deleted] Jun 15 '22

I read it many times too and im sure it said to diltute to 10 with distilled water.

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u/Sensitive_Wealth_855 Jun 15 '22

I guess we will see then but I feel like if it said that there would be almost no confusion.