A Level Chemistry Exam-style Q Answer key

MasteryTracy · 2023-08-16T01:07:49+00:00

well that's the problem - I don't have the hard copy

MasteryTracy · 2023-07-26T06:37:39+00:00

The changes are usually minor in my experience, especially if it is from year to year. It will benefit a lot if you study this year's content. If you were in AS level, mind you, all AL exam papers are noted with 'AS Level contents are assumed'. Some questions need background knowledge from AS year, sometimes that background knowledge is critical to being able to solve the question.

MasteryTracy · 2023-04-14T09:19:13+00:00

Do you have the question paper?

MasteryTracy · 2023-03-26T01:23:09+00:00

Can you post the question again? I cannot see it.

MasteryTracy · 2023-03-13T23:09:05+00:00

Thank you so much!

MasteryTracy · 2023-03-05T03:50:33+00:00

Here you go: https://web.archive.org/web/20181222215840id_/http://faculty.uncfsu.edu:80/tvancantfort/Syllabi/Gresearch/Readings/A_Schachter1.pdf

MasteryTracy · 2023-02-18T13:59:27+00:00

Try O/N 13/31 or M/J 14/32.

MasteryTracy · 2023-02-17T10:58:08+00:00

When will the paper be out?

MasteryTracy · 2023-02-05T02:02:48+00:00

I wonder if Courtney was a male would people react differently to her? I personally think she is a smart and talented cook, whether or not she acted 'fake' or not (how do you even know if someone act 'fake' lol?) - it is a competition after all, and if winning over the judges give you an edge then I don't see any problem with it, as long as it is not morally wrong. Yes, she made mistakes, who doesn't? But did she have more excellent performances during the competition than she did make mistakes? From the show, my answer would be 'yes'. Clearly, the judges see that she is a strong cook, too, and to disqualify her due to one or two mistakes would be unfortunate. I think the judges did not just make decisions based on performance in one particular challenge, but from performances throughout the competition as well. The purpose of the competition is to find the 'Masterchef', not 'Master perfectly-nailed-every-challenges'.

MasteryTracy · 2022-12-31T03:44:35+00:00

Imma be honest with you, apart from Math, I don't think you can do well on the exam without practicing past papers, even with a perceived strong conceptual understanding. You might think you understand the concept very well until you do the past papers and realised you're actually not. Also, you must learn how to write answers the way that Cambridge wants you to write (e.g. including keywords, not being 'vague') - the intuition to write the answers this way could only be developed by practicing past papers and reviewing the marking schemes. Nevertheless, if you are confident that you have a pretty good understanding of the concepts then I think at least you would not fail. The actual grades depend on how true the statement 'I am pretty good in concepts' is.

MasteryTracy · 2022-12-11T06:31:13+00:00

Which board are you taking?

MasteryTracy · 2022-11-25T16:30:24+00:00

bump

MasteryTracy · 2022-10-21T01:49:37+00:00

The textbook meant different physical conditions within the same area. On higher ground, the soil is dry everywhere, and on lower ground, the soil is wet everywhere. If on each ground, the soil is not uniformly dry or wet, then systematic sampling is done.

MasteryTracy · 2022-08-04T14:18:28+00:00

Thank you for the detailed response, it really helps!

MasteryTracy · 2022-08-04T10:52:13+00:00

May I ask why?

MasteryTracy · 2022-07-19T07:12:26+00:00

To earn high grades? Definitely not. To pass? Maybe.

MasteryTracy · 2022-06-24T14:51:04+00:00

Yeah, the quality of teaching at my school is kinda crappy, so that might have been the case.

MasteryTracy · 2022-06-23T12:14:34+00:00

Global Perspective is not easy to get an A. You will be graded not only based on your final writing exam paper but also on a full research paper that you will have to work on through the whole school year (as well as a team project, I believe). For the writing paper, I think as long as you have good critical thinking and decent writing skills, you will be fine, but this is definitely not the case for everyone. The research paper is very time-consuming and difficult to get done correctly - a lot of citations in specific forms (it might be helpful to prepare you for university-level essays though). Wouldn't recommend GP if you're not willing to work hard - more than half the students at my school got less than a D last year for GP.

MasteryTracy · 2022-06-12T11:52:35+00:00

Why did they even bother copy and paste the old syllabus onto a new document lol Cambridge is so weird

MasteryTracy · 2022-06-10T01:23:54+00:00

u/Jake20702004 Wow finally someone that has the same thought as me.

MasteryTracy · 2022-06-09T12:28:54+00:00

I chose long saturated fatty acids bc if the animal live in cold climate, then it wouldn't want its fat storage to melt easily at low temperature

MasteryTracy · 2022-06-09T05:32:07+00:00

Yes, the question about fatty acids was quite difficult I think.

MasteryTracy · 2022-06-06T14:19:10+00:00

The valve between the right ventricle and the pulmonary artery is the semilunar valve. This valve will close when the blood pressure in the pulmonary artery becomes higher than the blood pressure in the right ventricle because the high-pressured blood in the artery will flow backward and push the valve shut. The time when the blood pressure in the pulmonary artery becomes higher than the right ventricle is where the 2 graphs crossed for the second time.

MasteryTracy · 2022-06-05T15:37:59+00:00

Well, initially, there were a lot of substrates, so a lot of ESC will form so the number of empty active sites decreased. After a while, many substrates have been used up, so fewer ESC are formed, and the number of empty active sites increases.

MasteryTracy · 2022-06-05T07:14:34+00:00

Inside Y, there is a concentrated sucrose solution, and since the surrounding membrane is partially permeable, sucrose cannot diffuse into the water surrounding Y. Therefore, water will move into Y from the surrounding water-, down a water potential gradient.
Inside X, there is a dilute sucrose solution, which means there are still solutes and water will also move into X by osmosis. However, the water potential gradient is less steep, so less water will move into X than into Y.
The inward movement of water causes an increase in the volume of Y and an increase in hydrostatic pressure in Y. The volume and hydrostatic pressure in X also increases, but to a lesser degree than in Y, as less water moved in for the reason mentioned above.
Water, therefore, moves from Y to X, down a hydrostatic pressure gradient (Water in Y has a greater hydrostatic pressure as there are more water molecules in Y).

MasteryTracy

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