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AQA GCSE - Unit 3 (P3,B3,C3) New specification papers. Watch

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    (Original post by grammar12)
    Same really, two of my science teachers are great, but one is awful! I've bought these three revision guides and they are absolutely fantastic!

    http://www.amazon.co.uk/Science-GCSE.../dp/1408508311
    http://www.amazon.co.uk/Science-GCSE...d_bxgy_b_img_y
    http://www.amazon.co.uk/Science-GCSE...d_bxgy_b_img_z

    They are approved exclusively by AQA and they contain literally everything you need to know on every single unit (Im retaking unit 1 biology this summer which is included all in the same book) I really would recommend these books as AQA often look for key words in examinations and all of these are highlighted in the book. Basically, i would really recommend you to buy these books! Im probably going to start revision on good friday for my summer exams, whilst battling with unfinished art coursework!
    I got mine from the library
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    (Original post by Arshii)
    I'll Do it!
    B3:
    Explain the ways that exchanging materials in your body is made efficient.
    wooo! I will do it in the context of the lungs if that is OK

    -Lungs are constantly ventilated
    -Constant blood flow allowing for a constant high concentration gradient
    -Large surface area of Alveoli in lungs
    -Thin and Moist wall to allow for a higher rate of diffusion

    K, now my turn! Pick Physics, bio or chem?
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    (Original post by NightStrider)
    I got mine from the library
    What books is it, the link won't load
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    (Original post by Efemena15)
    Are we all allowed to answer the questions or just you two?
    Join in, we wont bite .
    No but seriously, i'll ask you one!

    What precautions do radiographers take to minimize exposure to radiation?
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    (Original post by Malaikahr)
    What books is it, the link won't load
    http://www.waterstones.com/waterston...FQLHtAodYHQAfA
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    (Original post by Arshii)
    I'll Do it!
    B3:
    Explain the ways that exchanging materials in your body is made efficient.
    Increasing/having a large surface area, having a good blood supply for a concentration gradient, ventilation in breathing to allow a steep concentration gradient and being thin to provide a short diffusion path.


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    ThankYou
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    Anyone still up for the revision game??? :L


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    (Original post by lolface32)
    wooo! I will do it in the context of the lungs if that is OK

    -Lungs are constantly ventilated
    -Constant blood flow allowing for a constant high concentration gradient
    -Large surface area of Alveoli in lungs
    -Thin and Moist wall to allow for a higher rate of diffusion

    K, now my turn! Pick Physics, bio or chem?
    Correct!
    And do any ..
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    (Original post by Captain Anonymous)
    Anyone still up for the revision game??? :L


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    Still going! Joooiiin us!
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    (Original post by lolface32)
    Still going! Joooiiin us!
    What is the function group of carboxylic acids


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    (Original post by Arshii)
    Correct!
    And do any ..
    Your friend weighs 300N and sits 2m from the pivot of a seesaw. Assuming you weigh 700N, where would you sit to balance the seesaw?
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    (Original post by Arshii)
    Correct!
    And do any ..
    Why are carboxylic acids called 'weak acids'


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    (Original post by Captain Anonymous)
    What is the function group of carboxylic acids


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    '-COOH'?

    Give two ways the Efficiency of food production can be improved!
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    (Original post by lolface32)
    '-COOH'?

    Give two ways the Efficiency of food production can be improved!
    Correct! Farmers could reduce the movement of the animals by keeping them indoors and also we should eat food directly from plants as it will increase the biomass of our food and lastly farmers should control temperature conditions outdoors so the animals don't use, decrease the energy from respiration to warm up there bodies


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    Explain why the reactivity decreases going down group 1...


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    (Original post by Captain Anonymous)
    Correct! Farmers could reduce the movement of the animals by keeping them indoors and also we should eat food directly from plants as it will increase the biomass of our food and lastly farmers should control temperature conditions outdoors so the animals don't use, decrease the energy from respiration to warm up there bodies


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    boooyah!
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    (Original post by lolface32)
    boooyah!
    yaaay!!!!!
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    (Original post by Captain Anonymous)
    Explain why the reactivity decreases going down group 1...


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    The outer electron is more easily lost due to it being further away from the Nucleus
    What is 'active transport'?
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    (Original post by lolface32)
    The outer electron is more easily lost due to it being further away from the Nucleus
    What is 'active transport'?
    Yh basically so correct, however, just make sure you know this in detail.

    Active transport is the movement of particles from an area of low concentration, to an area of high concentration , which is against the concentration gradient.
 
 
 
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