A level/GCSE bio and chem help

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leahmae49
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Hi! My name is Leah and I’m a second year a level student doing biology and chemistry. If you have any questions and need help just give me a message and I’ll try my best to help
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Squiggles1238
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Hello! Im a year 12 taking bio and im really struggling, any advice?
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leahmae49
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(Original post by Squiggles1238)
Hello! Im a year 12 taking bio and im really struggling, any advice?
Hi! I kinda had the same thing at the start of year 12, but you will understand it more as it goes along and I would say the best thing to do is to practice questions on topics you’ve done and I have a tutor for chemistry so maybe you could look into that
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pk027
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Hiii,
Is this correct? And could you please explain what water exiting at day at night has to do with this? (just at gcse level)
Thank youuu
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leahmae49
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(Original post by pkaur027)
Hiii,
Is this correct? And could you please explain what water exiting at day at night has to do with this? (just at gcse level)
Thank youuu
Yes this answer is great as you’ve compared the guard cells during both night and day and how that effects the amount of CO2 and water going in for photosynthesis although it might be good to mention about O2 leaving the stomata in photosynthesis as well so two gases are involved here. Water is important to mention because during transpiration which I think you know of, water vapour exits the leaf via the stomata during the process and obviously water is needed to go into the stomata for photosynthesis. I hope this helps
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username54
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(Original post by leahmae49)
Hi! My name is Leah and I’m a second year a level student doing biology and chemistry. If you have any questions and need help just give me a message and I’ll try my best to help
How do you answer 4 and 6 markers for science. I do AQA combined science trilogy
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leahmae49
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(Original post by username54)
How do you answer 4 and 6 markers for science. I do AQA combined science trilogy
Okay so what I try and do is think about the main points that you’re going to get marked for, so for example if it says ‘in what ways are the human population causing global warming’ and it was 4 marks I would have two ways and then explain them both so you get two marks for your main points and then another two for each explanation. In my experience, a lot of 6 markers are about explaining a process that has lots of steps so for that it’s about trying to explain without too many filler words otherwise it turns into waffle. Try and get as much scientific words as you can in there. If you want to send an example of a long question I can talk you through more specifically how to answer it
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username54
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(Original post by leahmae49)
Okay so what I try and do is think about the main points that you’re going to get marked for, so for example if it says ‘in what ways are the human population causing global warming’ and it was 4 marks I would have two ways and then explain them both so you get two marks for your main points and then another two for each explanation. In my experience, a lot of 6 markers are about explaining a process that has lots of steps so for that it’s about trying to explain without too many filler words otherwise it turns into waffle. Try and get as much scientific words as you can in there. If you want to send an example of a long question I can talk you through more specifically how to answer it
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How would you go about answering this? Thank you very much
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leahmae49
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(Original post by username54)
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How would you go about answering this? Thank you very much
Okay so here we are trying to compare the heart rate between a smoker and a non- smoker during exercise. So I would say something about getting measuring both heart rates before the exercise so you have a value to compare with at the end. Then get the smoker to have a cigarette before they start exercising whereas the non smoker would not. They would both do the SAME exercise and in the SAME amount of time and be the SAME age and at the SAME time.That’s very important to mention your controls to make this a valid and fair experiment as those factors can affect your heart rate values. They would both wear a heart rate monitor whilst doing their exercise. And you could conduct the experiment over three days so they repeat the exercise so you can calculate a mean to make the experiment more accurate.
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username54
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(Original post by leahmae49)
Okay so here we are trying to compare the heart rate between a smoker and a non- smoker during exercise. So I would say something about getting measuring both heart rates before the exercise so you have a value to compare with at the end. Then get the smoker to have a cigarette before they start exercising whereas the non smoker would not. They would both do the SAME exercise and in the SAME amount of time and be the SAME age and at the SAME time.That’s very important to mention your controls to make this a valid and fair experiment as those factors can affect your heart rate values. They would both wear a heart rate monitor whilst doing their exercise. And you could conduct the experiment over three days so they repeat the exercise so you can calculate a mean to make the experiment more accurate.
Thank you so much, could you please model an answer so i can see how to include all my points coherently. Sorry if its too much hassle
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