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    (Original post by Love123443)
    Explain how vegetable oils are extracted from plants?
    The seeds of the plant are crushed and the water is removed by distillation, leaving vegetable oil seperate.
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    (Original post by Obnox)
    Thats what im assuming as well, could be on + and - of extracting metals, but they are both similar
    It could also be on polymers, limestone cycle or early atmosphere / miller urey experiment

    Or maybe they'll be nice and throw in something really easy as the six marker such as subatomic particles and their relative charges and masses (just like the B1 - that was quite an easy 6 marker)
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    (Original post by Love123443)
    Explain how vegetable oils are extracted from plants?
    The seeds are crushed, steam distilled and pressed. First press is done cold and is better quality.
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    (Original post by MaxHSloan)
    Does anyone know if we need to know the catalyst for reacting steam with ethene?
    It's a phosphoric acid catalyst if you need to know
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    What is electrolysis?
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    (Original post by IAmAnTroll)
    What do hydrocarbons contain (2 marks)?
    only hydrogen and carbon bonds and are either saturated (singular bond) or unsaturated (double carbon-carbon bond)
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    (Original post by Love123443)
    Explain how vegetable oils are extracted from plants?
    nuts, seeds or fruits

    crushed and pressed first
    water + other impurities removed

    distillation of a mixture of the plant material with water
    oil separated from water afterwards
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    (Original post by t10r)
    It could also be on polymers, limestone cycle or early atmosphere / miller urey experiment

    Or maybe they'll be nice and throw in something really easy as the six marker such as subatomic particles and their relative charges and masses (just like the B1 - that was quite an easy 6 marker)
    Good suggestions, but last years 6 marker was on the atmosphere so im not sure that will come up again.
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    (Original post by whyaqawhy)
    The seeds of the plant are crushed and the water is removed by distillation, leaving vegetable oil seperate.
    I think you're wrong. The oil you get from crushing the seeds is added to water and then evaporated. It is then condensed and seeing as oil is less dense than water as well as oil being unable to dissolve in water, 2 layers are made with the oil layer at top and the water layer at the bottom. This can separated just by carefully pouring out the oil.
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    (Original post by IAmAnTroll)
    What do hydrocarbons contain (2 marks)?
    they contain only carbon and hydrogen (alkanes and alkenes)
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    Carbon and hydrogen
    (Original post by IAmAnTroll)
    What do hydrocarbons contain (2 marks)?
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    (Original post by Itzlauryn)
    What is electrolysis?
    The breaking down of a compound using electricity.
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    What is the Primordial Soup theory?
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    What are the properties of hydrocarbons as the chain gets smaller?
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    (Original post by t10r)
    I think you're wrong. The oil you get from crushing the seeds is added to water and then evaporated. It is then condensed and seeing as oil is less dense than water as well as oil being unable to dissolve in water, 2 layers are made with the oil layer at top and the water layer at the bottom. This can separated just by carefully pouring out the oil.
    Firstly why would you add the oil to water in first place? Im pretty sure the water is distilled and dont have to mention anything at all about denseness its not a big complicated process.
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    Does methene exist? Explain why. (2 marks)
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    Why is cooking foods in oil better then cooking foods in water? (1 mark)
    Explain how emulsifiers work?(3 or 4 marks)
    Describe the Miller-Urey experiment(4 marks)
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    Explain the primordial soup theory?
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    (Original post by GeorgeMillerr)
    What is the Primordial Soup theory?
    THe theory that the solution of amino acids (building blocks of life) led to development of molecules and organisms. This was caused by the reaction (with lightning) with the gases in the earths early atmosphere.
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    Explain how earthquakes occur. (3 marks)
 
 
 
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