Kreyszig Posted October 24, 2011 Report Share Posted October 24, 2011 Doing a hypothesis and predicting outcomes will gain you no marks. Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted October 24, 2011 Author Report Share Posted October 24, 2011 Doesn't mean you can't include a hypothesis, it makes it better, hence the title. 1 Reply Link to post Share on other sites More sharing options...
Kreyszig Posted October 24, 2011 Report Share Posted October 24, 2011 Really now? If you say so, I just wanted to point that out to people who define 'better' as obtaining a high grade and spending less time.BTW in the CE you need to compare the literature value with obtained value and compare the difference with the errors. Anyone who doesn't do this will be getting a 1/2 max for 'evaluating procedure'. Reply Link to post Share on other sites More sharing options...
ILM Posted October 24, 2011 Report Share Posted October 24, 2011 Really now? If you say so, I just wanted to point that out to people who define 'better' as obtaining a high grade and spending less time.BTW in the CE you need to compare the literature value with obtained value and compare the difference with the errors. Anyone who doesn't do this will be getting a 1/2 max for 'evaluating procedure'.I know that it is good to have a comparison between the difference in lit. Value and your value, but i don't think that it is a "must' since IB knows that some labs like enzyme or reaction activity has no lit. value. 1 Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted October 24, 2011 Author Report Share Posted October 24, 2011 Why are you being so offensive about this again? You don't want to include a hypothesis..just don't add one. Simple as that. As for CE, that's not something you must do. I asked a biology teacher( an IB examiner) about it back then and he said I don't have to include that and people got almost perfect grades without including it too. Once again, you want to include..just include. Simple as that. You don't have to be so tacky about it. Reply Link to post Share on other sites More sharing options...
CCYL Posted November 20, 2011 Report Share Posted November 20, 2011 Is background information regarding the research question required for a bio design lab? And if yes, what type of background information? Reply Link to post Share on other sites More sharing options...
Award Winning Boss Posted December 31, 2011 Report Share Posted December 31, 2011 hi, I'm doing my first design for IB HL biology and I would like to know how to reference sources I used, e.g. wikipedia?thanksI know precisely nothing about about the IB biology course but i can say... don't reference Wikipedia. It's not really a well respected source because it's an open source website. If you're on word you can create footnotes by pressing Ctrl + Alt + F Reply Link to post Share on other sites More sharing options...
The Economist Posted December 31, 2011 Report Share Posted December 31, 2011 hi, I'm doing my first design for IB HL biology and I would like to know how to reference sources I used, e.g. wikipedia?thanksI used http://www.easybib.com/ for every single one of my essays and I found it to be extremely helpful. I actually didn't even have to bother about references! It does the work for you. Hope it helps. Reply Link to post Share on other sites More sharing options...
EmskyBizz Posted January 19, 2012 Report Share Posted January 19, 2012 Hi, I am in the middle of revising an I.A., and I was wondering if it's possible to be TOO anal about the I.A.? Like, do I need to go crazy with grammar and sig figs?Also, while on the topic of sig figs and uncertainties, if I have a number like 128.53 ± .01, should I have 3 sig figs, or should I go two places past the decimal? Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted January 20, 2012 Author Report Share Posted January 20, 2012 Hi, I am in the middle of revising an I.A., and I was wondering if it's possible to be TOO anal about the I.A.? Like, do I need to go crazy with grammar and sig figs?Also, while on the topic of sig figs and uncertainties, if I have a number like 128.53 ± .01, should I have 3 sig figs, or should I go two places past the decimal?If you are able to make it error-free in terms of grammar, why not? There is no criteria specifying that the grammar needs to be this and that, or sig figures need to be this or that (have to check about the latter), not from what I recall at least. That being said, our teachers always insisted that our values need to be to 3 sig fig, unless it's like an apparatus measurement, in that case, it needs to be to the same decimal places/sig figures as the error. For example the table on pg. 1, see how all the values are to the same decimal places as the error stated at the top? So for the example you gave up, you go with 2 decimal places. Reply Link to post Share on other sites More sharing options...
tixi.13 <3 Posted February 16, 2012 Report Share Posted February 16, 2012 we were told to put our weaknesses,limitations and improvements into a table. our teacher's pretty scary and she insisted that that was the way to present it in the evaluation. Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted February 16, 2012 Author Report Share Posted February 16, 2012 The representation doesn't really matter as long as it contains the things you need to mention. Yes it looks neat and easier to read, but not putting them in a table wont take any marks away from you. Reply Link to post Share on other sites More sharing options...
jessie88 Posted February 22, 2012 Report Share Posted February 22, 2012 Do I need to include the uncertainty of a cork borer? If so, how would I calculate it? Reply Link to post Share on other sites More sharing options...
IB wannabe Posted February 23, 2012 Report Share Posted February 23, 2012 Do I need to include the uncertainty of a cork borer? If so, how would I calculate it? You don't have to put uncertainty for cork borer of course. You need to put uncertainties for pieces of apparatus that are used for measuring (for example balances, pipettes, measuring cylinders etc.) Usually uncertainties are marked at the piece of equipment , if they are not than you calculate it by dividing the smallest unit of measuring apparatus by 2. Putting uncertainty for something like cork borer would be just like putting uncertainty for spatula - absurd and silly Reply Link to post Share on other sites More sharing options...
nanon Posted March 6, 2012 Report Share Posted March 6, 2012 This is really informative- thanks! Just a question- I have had conflicting direction on how to structure a research question. I am doing my first prac report at the moment, by the way. Is it better to keep the research question generic, ie What is the effect of changing the surface area of a membrane on the rate of diffusion? and then specify the type of cell and solute which will be used in the prac later on (in method) or is it better to have the research question being specific: What is the effect of changing the surface area of a potato cell on the rate of diffusion of a sodium solute? Thanks for the help! 1 Reply Link to post Share on other sites More sharing options...
misshaha Posted March 6, 2012 Report Share Posted March 6, 2012 Thanks for the very informative text Just wanted to add for the Design: I don't know it its the same for all you guys but my biology teacher always requires us to explain, why a variable is constant or independent/dependent. For instance: the temperature was held constant at room temperature as changes in the solution would lead to unreliable data, as the enzyme reaction is affected by changes in temperature... Reply Link to post Share on other sites More sharing options...
draikcor Posted March 18, 2012 Report Share Posted March 18, 2012 Quick question! Does the control count as one of the five variables? Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted March 18, 2012 Author Report Share Posted March 18, 2012 Which five variables? Reply Link to post Share on other sites More sharing options...
Artoth Posted March 18, 2012 Report Share Posted March 18, 2012 I think he means that for example to plot a graph you need 5 different data points to make is more realiable. I think it depends on experiment but it'll be safer not to count it in Reply Link to post Share on other sites More sharing options...
draikcor Posted March 19, 2012 Report Share Posted March 19, 2012 Well...I'm doing an IA on the effects of browning in banana slices and I tested the browning with Coca-Cola, white vinegar, lemon juice, and soy sauce. I'm wondering if I need to do one more test.One more thing: how do you use the pH strips? Do we compare the colors after it has dried or while the pH paper is still wet? Reply Link to post Share on other sites More sharing options...
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