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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 367419 times)

Offline SNA

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1305 on: May 19, 2010, 05:09:47 pm »
Quote from: thenewkid™ on May 19, 2010, 04:56:24 pm
there is one question in which you have to draw an organism shown in a pic. i am really bad at drawing :(
do u guys hv any points? or am i lost? :(
make the drawing big,approximately twice as big.
dont overlap the drawing lines - make smooth line.
dont shade the drawing unless stated ( but so far,i've never found question that asks to shade the drawing).
make a point to label the diagram - atleast 3.
lastly,please draw EVERYTHING you see, even a small circle on a cell for instance. draw it!
thats wat i can think of so far. hope it helped! :)

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Offline coralandd

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1306 on: May 19, 2010, 05:11:33 pm »
can anyone pretty please tell me the function of heatscreen??? :-[
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Offline Shazizzzle

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1307 on: May 19, 2010, 05:14:30 pm »
Quote from: coralandd on May 19, 2010, 05:11:33 pm
can anyone pretty please tell me the function of heatscreen??? :-[

Umm, it absorbs the heat from the light source, i.e acts as a filter, preventing heat from passing through. It allows only light intensity to pass through. It is essential in experiments where temperature may affect the results, i.e photosynthesis.
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Offline Fastal

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1308 on: May 19, 2010, 05:15:38 pm »
can someone post the graph for dry mass in germination?
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Offline toleen

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1309 on: May 19, 2010, 05:19:39 pm »
i gess u should pray for all of us .
well thanx wish for all of us best of luck .
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Offline coralandd

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1310 on: May 19, 2010, 05:20:59 pm »
Quote from: Shazizzzle on May 19, 2010, 05:14:30 pm
Umm, it absorbs the heat from the light source, i.e acts as a filter, preventing heat from passing through. It allows only light intensity to pass through. It is essential in experiments where temperature may affect the results, i.e photosynthesis.

ttthhhaaaannnnnnnkkkkkkkksssssss a looooooottttttttt <3<3<3
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Offline Lariemeeva

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1311 on: May 19, 2010, 05:28:18 pm »
So I'm still founded by this idea https://studentforums.biz/index.php/topic,7496.0.html and even though we didn't get a chance to make one for Chemistry, I hope someone checks this out and does the same for Biology.

I'm also looking for some really great links for Bio P6 help, if anyone knows some, It'd be really nice to share them...

And does anyone know if the Past papers ever had the tests for Iodine and the other food tests on the last page of the test just like Physics 2006?
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Offline Shazizzzle

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1312 on: May 19, 2010, 05:30:29 pm »
Quote from: aangel42 on May 19, 2010, 05:26:28 pm
In M/J 2008 for labeling the tomato (2a), they mention labeling the placenta in the mark scheme. What is a placenta in plants and what exactly are we supposed to label in such a case?

(If fruits other than a tomato are given, we can really only label the seeds and the pericarp right? What else is there?)

Also, completely irrelevant, let's say I get a 20/40 for P6 but do REALLY well in P3 and P1 (safe A's). Do I still have a shot at an A*? ThANKs :)

They refer to that watery part in the middle with the seed branching out on both sides from the center. That looks like a placenta too, so they named it that. :S Weird, I know.

Umm, you can also label the central region i.e the fruit nutrients part, the real thing itself, as the 'endosperm'.

Umm, the percentile is usually at a 29-30/40 for P6. So, if you try exceptionally hard in p3 and p1, you might just get an A*, but As in all are necessary, I guess.
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1313 on: May 19, 2010, 05:34:15 pm »
For M/J/08 Paper 6, Q.3)b)i):

How do we measure the distance grown (mm) accurately from the diagram.  The pollen tube is not a straight line so how do we measure it?

Q.3)a)ii)

Where is the micropyle?  Is it the whole in between C at the right-hand side?  The big hole?
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1314 on: May 19, 2010, 05:36:43 pm »
Also, what is the rough grade boundary for A* with all 3 components combined?  How do we calculate it, say for O/N/09.
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Always willing to help!  8)
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Offline J.Darren

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1315 on: May 19, 2010, 06:00:09 pm »
Quote from: Ivo on May 19, 2010, 05:36:43 pm
Also, what is the rough grade boundary for A* with all 3 components combined?  How do we calculate it, say for O/N/09.
It is not like that, there isn't a fixed grade boundary for A*, the top xx % of the candidates in the examination would receive the A* grade ....
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Offline the_grim_reaper

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1316 on: May 19, 2010, 06:09:15 pm »
Guys just one final thing, if we're asked to compare say the amount of protein, carbohydrate etc. in something, would it be better to say that for protein say the one which has more protein gives a darker purple colour or would it be better to say that it gets purple first (time period)????
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Offline Lariemeeva

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1317 on: May 19, 2010, 06:30:02 pm »
Quote from: Lariemeeva on May 19, 2010, 05:28:18 pm
So I'm still founded by this idea https://studentforums.biz/index.php/topic,7496.0.html and even though we didn't get a chance to make one for Chemistry, I hope someone checks this out and does the same for Biology.

I'm also looking for some really great links for Bio P6 help, if anyone knows some, It'd be really nice to share them...

And does anyone know if the Past papers ever had the tests for Iodine and the other food tests on the last page of the test just like Physics 2006?

I hope someone can actually help before the exam.
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Offline SNA

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1318 on: May 19, 2010, 06:48:17 pm »
Quote from: Lariemeeva on May 19, 2010, 06:30:02 pm
I hope someone can actually help before the exam.
im sorry cuz i cant help with the notes.
but for the food test,most likely will come.better know it by heart!
good luck!  ;)
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1319 on: May 19, 2010, 07:24:17 pm »
magnification=size of image/size of object
big differece between *1 and*100
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