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All AQA iGCSE Sciences (summer 2013) discussion Watch

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    Hi guys,
    just thought I would make a thread including all the sciences for AQA iGCSE so we can discuss pre or post exams and evaluate difficulties of exams and rough estimations of grade boundaries and mark schemes. Thanks- good luck
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    What other hard questions on biology?
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    Hard questions I felt were decay, bacteria/potato trend and eutrophication
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    Eutrophication was just recall? What about on the skin cancer , what do you reckon will be the mark scheme for two graph questions
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    (Original post by Nerd44)
    Eutrophication was just recall? What about on the skin cancer , what do you reckon will be the mark scheme for two graph questions
    I wrote a massive essay for both of those questions but i think all you had to do was describe the trends in the graph, give a few examples from points on the graph, notice the trend between going on holiday and people with the melanoma, and for the explain why question just say that people tend to go on holiday to places with sun, and if they aren't wearing sun cream they'll be more susceptible to penetration from uv light which could trigger fast division of skin cells, causing the melanoma
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    I completely messed up the melanoma skin cancer one, I had to re-write it like, three times -.- I missed out chemical diffusion at synapses on the CNS question too


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    What did everyone else write for the potato one? I said it was to do with enzymes but I don't actually know


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    (Original post by matchstickhouses)
    I completely messed up the melanoma skin cancer one, I had to re-write it like, three times -.- I missed out chemical diffusion at synapses on the CNS question too


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    i wouldn't worry, it'll lose you max 1 mark
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    (Original post by matchstickhouses)
    What did everyone else write for the potato one? I said it was to do with enzymes but I don't actually know


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    i believe i wrote something about the microorganism ingesting some of the potato so it could break it down into nutrients, and to do this it has to respire, so the process of respiration release carbon dioxide which contains carbon which is necessary for carbohydrates, but i think i got it wrong...
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    (Original post by Hamish_wells)
    Hi guys,
    just thought I would make a thread including all the sciences for AQA iGCSE so we can discuss pre or post exams and evaluate difficulties of exams and rough estimations of grade boundaries and mark schemes. Thanks- good luck
    what is arough grade for b
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    Ive definitely got mixed feelings about this one... Exam technique always seems to trip me up but no one knows what will happen a it's the first year! Good luck in chemistry what do you guys think will come up? There's so much to learn...
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    apparently the 6 mark question wasn't about eutrophication because it was a flowing stream? SS

    also did you guys get 37.5% for the percentage change of MRSA?
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    (Original post by King Amukee)
    apparently the 6 mark question wasn't about eutrophication because it was a flowing stream? SS

    also did you guys get 37.5% for the percentage change of MRSA?
    cant eutrophication also happern in small streams though
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    (Original post by richardsondpu)
    cant eutrophication also happern in small streams though
    That's what I'm hoping, or it's six marks down the drain xD
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    look at pic at the top
    http://en.wikipedia.org/wiki/Eutrophication
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    nah wikipedia said it can happen in streams
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    (Original post by King Amukee)
    That's what I'm hoping, or it's six marks down the drain xD
    There's nothing else on the syllabus that the question could have been relating to, and it talks about the effects on plants and invertebrates, so it had to be
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    plus first year so low grade boundary
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    you reckon 80% for a*?
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    (Original post by King Amukee)
    you reckon 80% for a*?
    possibly lower, according to our teacher
 
 
 
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