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Exams

Found 762 results

  1. Hey So for my Bio IA I conducted a T-Test and I got a value of 0.08, which is HUGE. All the times I've done T-Tests I've gotten values less than 0.05 that allowed me to say that my values were statistically significant, but now I'm worried. Should I not include the T-Test in my IA?
  2. I'd asked my Bio teacher if I could do my IA on the effect of music on plant growth and at the time she'd said yes, but after I submitted my information sheet she said that it was an idea with a shaky foundation and that I need to turn in a new idea ASAP. Please help!!! I was thinking something along the lines of photosynthesis..... I don't know, I'm just really confused right now. Is there anything I can do that's relatively simple but not like, utter trash?
  3. Hello! I'm doing my extended essay on plant growth, but I only have 3 trials from my experimenting. I was told that theres hardly any statistical analysis that i can do without more than 5 trials, aside from calculating the mean, and I have no idea where to go with my data. I was planning on a lab based EE from primary data, but I'm not sure if thats possible anymore seeing as I dont have enough trials for in depth statistical analysis. Should I run more trials, or should I change direction with my EE and use my primary data to support secondary data, turning it into a research based essay instead of experimental?? Please help!! - Thanks, Cherry
  4. Hi!! This is my second year of IB and in order to study ESS more efficiently, I made a summary of the whole book. Let me know if you want it
  5. Hello, I have several ideas for my Bio IA, but I am not sure how well any of them actually are and if I could get a high mark on them or not. They are: 1) How do different concentrations of orlistat affect the activity of the enzyme lipase on the substrate butter as measured by……….? Here I am not sure how to measure the activity of the enzyme lipase. Any ideas? 2) How do different concentrations of the inhibitor (?) impact the enzyme lactase and its’ ability to break down lactose as measured by the glucose concentration of the remaining substance? Do any of you know about any inhibitors to lactase? If not any other ideas to make this question more unique would be great. Also what way is best to measure glucose concentration of lactase activity. I was thinking glucose strips but I am not sure. 3) How do different concentrations of copper (II) sulphate affect the activity of the enzyme catalase derived from bananas (maybe liver) on the substrate hydrogen peroxide as measured by……(it’s decomposition??)? Any ideas on how to measure the decomposition of hydrogen peroxide would be great. I know of a few but I am not sure my school has the equipment. Also is this an overdone idea?
  6. Hello everyone! I'm going into the 10th grade this year, and am planning on doing the IB program 11th-12th grade. In the future I am hoping to be a pediatrician, so I was looking online for what IB classes you should take in order for medical school. Most sites said Biology and Chemistry HL. I like chemistry a lot and am hoping to HL in that, but I'm not so sure about biology. So, first of all, would HL biology be necessary for medical school? Also, if I did do HL bio, would it be important to take biology this year too? (Pre-IB) I'm currently signed up to do physics, and I did biology in 8th grade, but I've heard that HL bio is really difficult so I'm wondering if I should take up biology this year to be prepared for when I do IB. Also, considering I want to be a pediatrician, I'm unsure whether physics is actually important or if I should just do biology instead. Thank you!
  7. Hi there, I am struggling to come up with a topic for my extended essay. I have a marine aquarium and I really wanted to do it on something relating to that. I am currently thinking that maybe a biology one about the symbiotic relationship between coral and zooxanthellae bacteria but am unsure how to word the question. Also thought maybe a world studies on chemistry and ESS about the relationship between calcium and alkalinity (they precipitate each other) and how this effects reef formations. I am open to ANY suggestions whatsoever so please don't hesitate to throw any ideas at me! thanks so much guys!
  8. It is for my IA Bio HL.. preferably the method is way cheaper and easier and not depending on human senses..
  9. Hi Everyone ! i misunderstood the standard level bio IA instructions for the amount of data points. It turns out you are just supposed to do 250 data points for each variable. i have 5 variables of course, and my ia is testing the length of grass seeds in different vitamin-soil mixtures. so I misunderstood everything and I did 250 data points for each variable, so all together I have a 1,000 data points. For example I tested Vitamin C, in 5 trials, with 50 data points per trial. So all together 250 points for one variable. The 50 points per trial were measuring the length of 50 grass seeds. now my teacher isn’t replying. I did all my data, and processed data like standard deviation and averages. please help. I have no idea what to do. I put all the raw data in the appendix. And all the processed data (averages of each trial) I put in the actual lab report. what should I do ? I’m not going to go over the 12 page limit. Can graders penalize me ??
  10. This is a handy checklist to use while writing your Bio HL IA. It has all those small detail that you may easily gain marks from putting in your IA.
  11. Going into jr year and class choices are due in a few weeks, please respond and thank you in advance to the ppl that do What sciences should I take and at what level if I wanna go into engineering or medical. Like what would be the best base for college? Also at what level should I take math? ^ 2 HL spots and 1 SL
  12. These are just some notes that I made to prepare for my end of year exams. It's missing linkage but everything else should be there!
  13. Long story short, I did a bio extended essay, messed up the experiment, instead of isolated colonies I got a single weird blob. No data collected. Failed the experiment. Am I allowed to use external data to support my arguments?
  14. Grade 10 bio notes for beginners.
  15. lella02

    IB Bio EE

    Hi all! I am in the process of deciding an EE topic. I have come up with a possible topic but upon discussing with my teacher she has told me that it does not have enough depth for IB diploma and lacks a biochemistry angle. My proposed topic is: The regeneration of Planaria Researching whether freshwater Planarian (flatworms) reproduce asexually by regeneration and what factors affect its ability to regenerate. Essentially, Planarians possess neoblasts (pluripotent adult stem cells) which have the ability to transform into a huge range of cells that are able to maintain and regenerate. I will be cutting planarian into segments, ranging in size. I will also research some other factors that may affect its ability to regenerate and incorporate those factors into my experiment. There is a lot missing from this and I am hoping to research and develop this more, but for now, I am stuck. My question is, how can I make this experiment more "IB-like?" and does there need to be biochemistry involved in these topics? Or is it because my teacher prefers us to focus on biochemistry because it is all we have learnt in IB Bio so far?
  16. Hi, guys. I am currently having a bit of trouble figuring out how to control oxygen concentration for the yeast and measure rate of respiration (based on carbon dioxide gas production) at the same time. If you have any ideas, please suggest how I could do this? I have never worked with oxygen before or tried adding a gas while measuring another. My biology teacher has told me that physically it may be difficult... But I feel like this is 10000x better than doing sucrose concentration. I have a few ideas such as isolating the yeast in a container with a specific oxygen concentration and having an aspirator/vacuum pump come out of it somehow for the carbon dioxide to be captured but I'm not sure how practical this is. In addition to that, how do I go about finding 'the best' oxygen concentrations for yeast? Do I just find the minimum oxygen concentration needed and then use values significantly higher/lower than that? I've researched that there's a point where that respiration will stop occurring in yeast if the oxygen concentration is too high. I was just wondering how I could go about finding this range/value. In addition to the above point, if this seems too difficult/impractical should I change my dependent variable? Should I measure the rate of respiration by the presence of another variable? Thanks, imperialbee
  17. I’m trying to decide the subjects to pick for my IB studies next year. Biology and chemistry hl have already been decided as I’m trying to get into medicine. My current placeholder of a choice is studying psychology hl, maths sl, and language A lang and lit, and ab initio Arabic (on top of bio and chem hl). I honestly don’t know if it’s a good idea to study three sciences (yes, I’m counting psychology) at hl! I didn’t get to study psychology during my middle years as my school didn’t offer the subject, but I’m really interested in the subject. Am I setting myself up for misery and anxiety ridden nights before and after the exams or is the combination that I’ve currently chosen feasible enough? And by the way, does an ab initio second language count as an SL subject and bear the same grading weights or am I supposed to study an extra subject??
  18. I seriously consider my Biology SL classes useless to get prepared for the IB exams. My teacher is not following the IB material, and I feel like I am wasting my time here. I am in the last 2 months of my Junior year. My IB exams are going to be in May 2019, so I guess I still have time, but I am worried day and night. Can somebody give me some tips to study IB Biology on my own? How can I get prepared to get the 7?
  19. Hello, I was wondering what counts in the word count for a biology EE, does calculation, table titles, headings, appendix, etc count?
  20. Hello everyone i need help on my biology ib my question is Does the diameter of hair change according to the hair dye colour utilised on it i have no idea what to do pls help thanks
  21. Hey everyone, According to the IB biology guide for exams commencing in 2016 onwards, it states in 5.3 that: "Application: Recognition features of bryophyta, filicinophyta, coniferophyta and angiospermophyta." There is no mention of requiring recognition features of animal phyla. However, my bio book by Cambridge University press (printed in 2015) and bioninja still has information on recognizing animal phyla. Could anyone here reconfirm this? Have you guys learned about animal phyla? Thank you!
  22. Hi all, I just wanted to know how difficult it's going to be for me to study and succeed in IB. I'm currently studying in grade 10 and I'll most probably start studying according to IB's curriculum next year. I'm currently studying the Holt McDougal Modern Chemistry, English Literature/writing, Biology, and Phyiscs. The McGraw Hill Algebra 2 on top of social studies, Farsi literature/writing and Arabic. I find all of the subjects I'm studying relatively easy (except Farsi. Even though it's my mother language), and I aced all of my finals last term. But I'm kinda stressed to be studying IB as I have no idea about the difficulty level. The hl subjects that I'm gonna pick are biology, chemistry, Farsi and English (I have no idea whether it's gonna be A or B; it's mandatory to study Farsi and English hl at my school) I want to study medicine and I looked at dozens of university admission requirements for the said course; most of the universities I'm interested in require a minimum of 6 in bio hl and chem hl on top of an overall score of 38/45. As I said, I just want to know how much energy I'll need to exert on my studies and how difficult it'll be to meet the mentioned requirements. Your insight would be appreciated! Edit: Do I need to study physics as wrll to get into medicine? I'm already picking Math sl so not sure how that'll work.
  23. Hi...I'm in a bit of a dilemma. I know I'm going to be studying sciences in university, but I'm not exactly sure what type of science I'm getting into. It's a bit stressful because I have my own preferences, while my parents' disagreement with these preferences make me scared to the bone. I know I want to take Chemistry at Higher Level, but my problem is between biology and physics (+ computer science, but I'd rather NOT get into that.) at HL. You see, I'm studying MYP right now and so far I really enjoy Biology and find it very interesting. As discussed with my careers counsellor, I could take my bachelor in Bio OR Chem and then take my Masters in Biochemistry, which I thought was a great idea because it is two subjects I enjoy (to a certain extent, but I'd also rather NOT get into that). My parents don't think that's a great idea though. My dad says I'm limiting myself wayyyyyyyyy too much (like a mouse hole kind of too much) if I delve straight into my masters after my bachelor. Sure, I get that. Maybe I'll work with my bachelor in Chem for a while. But that's also very limiting, apparently, and my only option is to take Chemistry and Physics/Computer science to get a bachelor in engineering. Except I dread Physics/ I'm not-so-great at it. And I've heard it's a death wish to take it at HL if I'm not ready to put in the effort or enjoy it to the fullest. News Flash: I'm not! (As for computer science, well, I'm not very sure because I've never studied it, but I'd assume I wouldn't be fascinated by the unduly amount of numbers and problem solving that seems to give high-paying jobs all around). The thing is, I'm not going to get into medicine. Not a doctor or radiologist or pharmacist. And Biology is practically a dead end to my parents, very shameful, if I don't want to be a doctor (which, I repeat, I DO NOT). I'm trying to cooperate with my parents by going into sciences (trust me, it's not my first choice), but I'd like to at least do something I like (to some certain extent). However, it seems like unless I get into computer science or Physics (engineering, really, is assumed to be the only job that'll get you some bucks here), I won't be successful. I've been told it's best to cry now and not later, but I'm not sure if that's necessarily true. I think if I take Physics and end up being an engineer I'll be crying 'til the rest of my days. But, at the same time, why should I trust myself? I'm a kid and puberty and hormones and total ignorance makes me rethink my choices in taking Chemistry and Biology at HL. Should I just take Physics and Chemistry and cry in a Ferrari? Sorry for the rambling. I appreciate any and all responses.
  24. Okay, so our biology teacher is a noob and we need help. She doesn't know what she's doing at all. She gives us the same tests that she gives her standard biology classes and we haven't covered the whole book at all. What do I do? I know for a fact that whatever she does won't help. So how do I save myself? What can I do to teach myself one of my least favorite subject? Please help me. I am dying and I don't want to fail.
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