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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 353756 times)

Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1575 on: May 23, 2010, 01:59:28 pm »
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1576 on: May 23, 2010, 02:00:30 pm »
Quote from: ~VIN1094~ on May 23, 2010, 01:43:46 pm
lol its is the 'stupid' answer .. because energy is lost in huge amounts as you go up the trophic levels, due to metabolism, heat loss n stuff .. further down the chain suppose 6 level .. u hav to eat LOTS of food !!!  ;)
i wish i was at the sixth trophic level. It wud b an 'all u can eat' for me. ;) LOL...thanks!
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Offline guMnam

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1577 on: May 23, 2010, 02:02:08 pm »
 :o :o :o
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1578 on: May 23, 2010, 02:04:04 pm »
Lol...THANKS EVERYONE.. :p and yeah i was going through the syllabus.. :)
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1579 on: May 23, 2010, 02:06:29 pm »
Do we need to know the stages for meiosis and mitosis? I mean even briefly. I learnt them in great detail earlier only to realise they havent even been hinted at in the syllabus.  >:(
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1580 on: May 23, 2010, 02:09:35 pm »
Quote from: ambitious94 on May 23, 2010, 02:06:29 pm
Do we need to know the stages for meiosis and mitosis? I mean even briefly. I learnt them in great detail earlier only to realise they havent even been hinted at in the syllabus.  >:(

No you don't.  Look in the syllabus, you only need to know definitions I quote: "details of stages are NOT required".

Definitions:

Mitosis:  Nuclear division giving rise to genetically identical cells in which the chromsome number is maintained by the exact duplication of chromosomes.

Meiosis:  Reduction division in which the chromosome number is halved from diploid to haploid.

Hope tha thelps!
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Always willing to help!  8)
"In helping others, we shall help ourselves, for whatever good we give out completes the circle and comes back to us."

Offline rhea

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1581 on: May 23, 2010, 02:15:04 pm »
HEY! plz help out for tis question:
Ammonium chloride is heated wit substance X. The gas given off turns damp litmus paper blue.

Which type of substance is X?
A. Acid
B. Base
C. Metal
D. Salt
 :-\ :-\ :-\
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1582 on: May 23, 2010, 02:16:38 pm »
Quote from: rhea on May 23, 2010, 02:15:04 pm
HEY! plz help out for tis question:
Ammonium chloride is heated wit substance X. The gas given off turns damp litmus paper blue.

Which type of substance is X?
A. Acid
B. Base
C. Metal
D. Salt
 :-\ :-\ :-\

Base - sodium hydroxide
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Always willing to help!  8)
"In helping others, we shall help ourselves, for whatever good we give out completes the circle and comes back to us."

nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1583 on: May 23, 2010, 02:24:06 pm »
check the syllabus. You need to know the radical tests of certain cations and anions. Memorise them.
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Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1584 on: May 23, 2010, 02:35:40 pm »
Quote from: nid404 on May 23, 2010, 02:24:06 pm
check the syllabus. You need to know the radical tests of certain cations and anions. Memorise them.

Yes, learn this.
« Last Edit: May 23, 2010, 02:38:19 pm by Ivo »
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Always willing to help!  8)
"In helping others, we shall help ourselves, for whatever good we give out completes the circle and comes back to us."

nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1585 on: May 23, 2010, 02:45:06 pm »
i was looking for this but couldn't find it

thanks ivo.
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holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1586 on: May 23, 2010, 02:51:02 pm »
Quote from: nid404 on May 23, 2010, 02:45:06 pm
i was looking for this but couldn't find it

thanks ivo.

Its on the last page of the Paper 5 practical test for IGCSE CHEM   ;D
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1587 on: May 23, 2010, 02:53:16 pm »
oh ok  :P I wouldn't know :P
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1588 on: May 23, 2010, 02:56:52 pm »
Quote from: Ivo on May 23, 2010, 02:09:35 pm
No you don't.  Look in the syllabus, you only need to know definitions I quote: "details of stages are NOT required".

Definitions:

Mitosis:  Nuclear division giving rise to genetically identical cells in which the chromsome number is maintained by the exact duplication of chromosomes.

Meiosis:  Reduction division in which the chromosome number is halved from diploid to haploid.

Hope tha thelps!
yep..it took a load off my mind :)
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Offline Helium

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1589 on: May 23, 2010, 02:57:50 pm »
Its also on page 27 of the chemistry syllabus for 2010
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