GCSE revision

lol what paper you doing for science?
and what topics you doing?

ive already done my science paper and i got a B! i'll help you guys if you want

thats good i failed science

physics and chemistry fault <_<

awwh man!! are you doing your GCSE'S at the mo?

lol nope i dont them

huh? sis can you say that agin please? lol sorry

oh right kool lolz

lol tanks ...i forgot my spelling now

don't worry im worse kasme, carry on talking to me or check my post and you'll know what im talking baout sis!

format_quote Originally Posted by Mr. Baldy

aslaam alykum,

it seems quite a loot of us peeps are doing GCSE's so why dont we revise together, you know like ask qu's and get answers e.t.c.

eh?

ok ill go dirst, give me a detailed description of the heart....

wa alykum aslaam

bismillah hirahman niraheem.

the heart has 4 chambers which pump blood all around the body (circularitry system)

the right side pumps de-oxygenated blood whilst the left side pumps oxygenated blood

4 features of the heart- right ventricle,left ventricle, right atrium, left atrium

oxygenated blood returns from the heart from the lungs, it then leaves the left side to travel around the body.

the semi lunar valve is to prevent the back flow of blood

deoxygenated blood returns to the heart. it leaves the right side of the heart to go to the lungs.

thats what ive been revising from, inshallah hope its sufficient!

mashallah the circularitry system is soo amazing, subhanallah. its a very complex design, by an Almighty Creator.

For those taking english literature :

Name 3 poetic techniques and describe their uses.

aslaam alykum,

nice there Hijabis sista,

ok enjambement, that is when the poet carries on to the next line,
the poet makes the poem really sensual to appeal to the senses (whats that called),
then there is ermmmm using sounds to give the poem the sound of something like the sea or the wind (i dont know what thats called)

^^^ would u believe i got an A* or my eng lit mock? i doubt it......

ok for IT describe the uses of an flow chart
wa alykum aslaam

oh i know that one! is that the sibilant 's'???

flowchart? IT? erm sorry bruv im only taking shortcourse


after someone has answered the brothers question please can you help me answer mine???

wots the mole?(please dont say something on your skin) how do you work it out???

aslaam alykum,

The mole is a large number, aprox 600 000 000 000 000 000 000 000

that = 1g of hydrogen
=12g of carbon
24g of magnesium

Therefore the relative atomic mass of an element can be expressed in grams contains ONE mole of atoms. This means that the number of atoms of an element can be worked out by weighing.

Calculations can be done by simple equations,

Moles of atoms = mass/RAM

Examples:
1) how many moles of atoms are there in 72g of Mg?
(RAM of mg= 24)

Write down the formula Moles= mass/RAM
rearang if necessary (not needed)
Subsitute the numbers moles= 72g/24
Write the answer and units moles = 3moles

2) what is the mass of 0.1 moles of carbon atoms?
(RAM of carbon = 12)
Write formula
rearange mass= moles * RAM
sub numbers mass= 0.1 * 12

3) how to work out chemical formulae:
What is the simplest formula of a hydrocarbon that contains 60g of carbons combined with 20g of hydrogen?
(RAMS = H=1 C= 12)
Write mass of each element C= 60 H = 20
work out moles using formula
find simplest ratio (divide by smallest number) 5/5= 120/5=1
Write the formula showing the ratio of atoms CH4 (LOL)

4) Moles of molecule
just add all the RAM masses together
e.g water = H2O (H=1, O= 16
The Relative Molecular Mass (RMM) = 1+1+16= 18

or

Carbon dioxide, CO2 (C=12, O=16)

The RMM = 12+16+16=44

('2' only applies to the oxgyen atom, coz theres 2 of them)

hope that helps, or has it just made u more confused??

wa alykum aslaam

jazakallah khair brother!
im slowly understanding it alhamdulilah. i'll read it a couple more times to get the hang of it.

aslaam alykum,

if you want i can try and make it less complicated....... or if ur happy with it.....

wa alykum aslaam