Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 356440 times)

Offline Raywin

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;D

Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1576 on: May 23, 2010, 02:00:30 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!

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

I <3 Challenges
Never give up :)

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.. :)
;D

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.  >:(

Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1580 on: May 23, 2010, 02:09:35 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!
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

 :-\ :-\ :-\

Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1582 on: May 23, 2010, 02:16:38 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
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.

Offline Ivo

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1584 on: May 23, 2010, 02:35:40 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 »
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.

holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1586 on: May 23, 2010, 02:51:02 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

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

Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1588 on: May 23, 2010, 02:56:52 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 :)

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
Aiming for the top