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Eyas

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    Male
  • Exams
    May 2009
  • Country
    Jordan

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  1. Actually, at least for Physics, Chemistry, and Math HL, the courses are equivalent to a full AS+A2 course. With the case of Math HL, it extends slightly beyond as well. Other subjects such as languages, economics, etc. might be harder with A levels, and SLs for group 4 and math.
  2. Eyas

    Business SL Notes

    Here are some good notes for the 2009 Syllabus for Business & Management SL. Some simple points are skipped and those which I thought needed focus are more detailed. I do recommend using it for studying and revising before exams, but always use the current syllabus to go through all points to make sure you covered everything. I only speak for myself, but I studied these notes solely during externals and received a score of 7 (P1: 7, P2: 6). Good luck!
  3. My theory about setting mark boundaries is that the IBO uses the total expected grades to get percentages of those who "should" get a 7, 6, 5, .. etc. and try to keep numbers close. This way, if 10% are predicted to be able to get 7s, about 10% will have the ability to get a 7.. not necesserily the same people though; a predicted 6 might do better than a predicted 7 student and "get his spot". The only reason I come to such conclusion (as opposed to a "curve") is that certain subjects have 100% of their students with 7s (when its a low number like ~10 studnets), and it only seems logical that the IBO uses teacher feedback in the form of predicted grades or others to determine how marks should be distributed (that is, according to how students' abilities are distributed, as judged by their teachers). Thoughts? Way off?
  4. Arabic A1 SL: 6 English A2 SL: 7 Business & Management SL: 7 Mathematics HL: 7 Physics HL: 7 Chemistry HL: 7 Physics EE: A TOK: B EE/TOK Points: +3 Total: 44
  5. The 2009 syllabus states that the formulas used in assessing the business's external environment will be provided for students in the examination. These include ratio analysis and investment appraisal formulae. I haven't ever seen such formulas mentioned in the exam paper itself nor have I seen a business exam booklet. How will such formulae be provided for students?
  6. Correct. 1/(235*u) and 1/(12*u) would also work, though.
  7. Eyas

    [PHYSICS]The Bohr Model

    I just checked the syllabus (again). It seems it was there in the previous syllabus (topic 12) where it explicitly states the Bohr model. The entire set of points corresponding to the Bohr models have been removed from the syllabus and instead only "describe the motion of electrons in terms of the electron-in-a-box model" (which includes the quantization of E_k of electrons based on n^2, but doesn't include specifics about the Bohr model itself).
  8. I've seen a few: Question B1, Part 2, (a) In the question, we are given a ratio of areas. According to the syllabus itself, the magnification is a ratio of lengths, so when calculating the magnification, one must take the square root of the ratio (taking the square root was omitted from the mark scheme). If we take the square root, the indentations of the leaf will actually be resolved. The question should either refer to the lengths of the leaves or the values of the areas must change so that the question is correct. Question B2, Part 1, © (i) The mark scheme says: number of atoms in 1 kg of carbon =12 x 1000 / N_A number in 1 kg of U-235 = 235 x 1000 / N_A If that was the case, 1 kg of carbon would contain 0.2 * 10^-20 atoms! Which is of course untrue. Same applies for the number in 1 kg of U-235. The ACTUAL number of atoms in 1 kg is given by: for C-12: 1/(12u) for U-235: 1/(235u) Thus the final answer of the ratio will be 2.3 * 10^6
  9. Eyas

    [PHYSICS]The Bohr Model

    Oh sorry! I usually remember to say the topic, hehe. I guess externals can take a toll on you
  10. I've checked the syllabus multiple times and the bohr model of the hydrogen atom seems to be removed, along with the derivations of Bohr's equations. Can anyone confirm this? (I see a lot of questions in past papers, and the Summary of Syllabus changes in the TSM says that the Nuclear and Quantum physics chapters are "mostly unchanged"). BTW, I'm HL.
  11. There's a mark scheme for it online. I dont think we're allowed to link for it or discuss it, but search if you really need to; google is your best friend. I am saving paper 2 till before the p2 exam, for now I just did paper 1. I found it pretty easy/fair to be honest, the only trouble I had was with Q13, part b, ©(ii). You need to square both then take the square root, supposedly a common math "trick"/technique, but it didnt occur to me at all. Oh and I really like question 10 The vectors question Oh well.
  12. Hey there, I haven't been able to find Arabic A1 mark boundaries anywhere. Any idea what the relevant boundaries are?
  13. Depends which way you look at it. 10P6 can both stand for: -the number of ways in which 6 people can occupy 10 different seats -the number of ways in which 6 seats can be assigned to 10 different people
  14. So I know its 1:30 hours for an SL A1 commentary, but I've heard that in math exams for instance, you get 5 minutes to go through the questions and read them. Is there anything similar in the A1 commentary where you are given time to see the texts? edit: okay I got my question answered. its amazing how much you could accomplish by calling your IB supervisor and asking we've grown too dependent on the internet for no apparent reason
  15. To answer the latter question first, always use 3sf and the same unit given in the question. I.e. for a compound interest question where the initial investment is given in dollars, (unless told otherwise in the body of the question), the answer should be in dollars, rounded to 3 significant figures. Same for time. Usually though for money questions, you are asked to give you answer to two decimal places (I've seen most past paper questions like that when solving money questions). As for the first question, you need to always use 3 significant figures unless told otherwise. If you get something like 312390, I usually like to write the final answer as "312390 =(approx_ 312000 (3 s. f.)". That shows 312000 as the final answer and shows the examiner that it is approximated.
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