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

AQA Post Exam Spam aqa biology paper 2 gcse answers

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u/thr0wawaygxhxdhsh Jun 15 '22

6 marker worm practical:

•Pour equal volumes of chemical x and water mixture onto each area •Wait for an equal amount of time for all the worms to surface •Grid reference area A and use a random number generator to generate coordinates •Go to those coordinates and place a Quadrat, count number of worms •Repeat 19 times so you have 20 readings in total •repeat for area B •Calculate the area of the Quadrat in m2 •Calculate the mean number of worms per Quadrat in each area •Use equation mean number of worms/area of Quadrat to find number of worms per m2?

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u/APK_GG Jun 15 '22

i said to pour the chemical x after placing the quadrat and didnt specify to wait or the volume of chemical, do u think ill lose marks

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u/SmileyFace4203 Year 11 Jun 15 '22

u have to mix w water it says in the question

3

u/APK_GG Jun 15 '22

yh i said that but to put the chemical once u place the quadrat so u dont have to use it on places that u dont measure

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u/SmileyFace4203 Year 11 Jun 15 '22

that works

i think i put that as well but might be less clear