AQA Physics P2 & P3 (Monday 19th May)

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victoria.98
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Who's sitting these Physics exams on Monday?

Any idea on the 6 markers or what AQA may be focusing on this year?
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erzrocks
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hey yer I am sitting the p2 exam on Monday I think a 6 marker will be on car safety in p2 - what is your target grade??
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webbo12345
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(Original post by victoria.98)
Who's sitting these Physics exams on Monday?

Any idea on the 6 markers or what AQA may be focusing on this year?
could be on radiation, how fusion or fission happens, it could be on formation or periods of the star life idc what do you think??
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victoria.98
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Ooh, I hope it's the life cycle of stars!

My predicted grade is an A, I have no idea why I'm doing P3, I'm awful at science! My school have made it compulsory!

I hope that the P3 exam is easier than the C3 exam!
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hbob
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so does anyone have any predictions for the 6 markers in p2/p3?
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Dneep
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p2 6 marker could be the life cycle of a star bigger than our sun
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Sayless
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(Original post by Dneep)
p2 6 marker could be the life cycle of a star bigger than our sun
(c) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.
A star goes through a lifecycle.
Describe the lifecycle of a star like the Sun.

Hydrogen and helium have gravity towards each other, as they start getting closer together the gravity increases and over a few billion years these elements were able to produce protostars. Fusion then occurs to produce a main sequence star because of the large amount of gravity and heat. Then when it runs out of hydrogen the fusion reactions decrease and it swells into a red giant. After the red giant runs out of its fuel then shrink into a white dwarf, it collapses under the force of gravity.

Is this a good answer to get most/all of the marks?
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interstitial
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(Original post by Sayless)
(c) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.
A star goes through a lifecycle.
Describe the lifecycle of a star bigger than the Sun.

Hydrogen and helium have gravity towards each other, as they start getting closer together the gravity increases and over a few billion years these elements were able to produce protostars. Fusion then occurs to produce a main sequence star because of the large amount of gravity and heat. Then when it runs out of hydrogen the fusion reactions decrease and it swells into a red giant. After the red giant runs out of its fuel then shrink into a white dwarf, it collapses under the force of gravity.

Is this a good answer to get most/all of the marks?
Whoops, I thought it said bigger XD

Gravitational attraction increases, not gravity.

Elements heavier than helium are fused during red giant phase in order to keep forces inside star balanced.


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Sayless
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(Original post by AlphaNick)
You phrase it weirdly... Helium and hydrogen are attracted to each other by gravitational force - and the force doesn't 'increase', but the density of particles increases.

The red giant swelling stage only occurs with heavier elements (than hydrogen, helium, lithium, beryllium, etc) and it is because there is a greater outward radiation force.

You may also have to describe that it forms a black dwarf when most of the energy has been released.
i don't understand what you mean that red giant swelling only works with heavy elements, i thought it happened with the hydrogen running out and the super nova forms heavy elements
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dalton-2626
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I think it will either be on the life cycle of the star or how fusion and fission happens for P2
Then for P3 I think it may be about electromagnets!
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interstitial
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(Original post by Sayless)
i don't understand what you mean that red giant swelling only works with heavy elements, i thought it happened with the hydrogen running out and the super nova forms heavy elements
It runs out of hydrogen and begins to cool, so it has to perform fusion with elements heavier than hydrogen in order to keep the forces inside the star balanced. These only release a small amount of energy, so they can't keep the star going for much longer.

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Sayless
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(Original post by majmuh24)
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Whoops, I thought it said bigger XD

Gravitational attraction increases, not gravity.

Elements heavier than helium are fused during red giant phase in order to keep forces inside star balanced.


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how does the red giant turn into a white dwarf if the forces are balanced, does it run out of heavier elements?
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(Original post by Sayless)
how does the red giant turn into a white dwarf if the forces are balanced, does it run out of heavier elements?
The forces aren't balanced. It does run out of elements to fuse as iron nuclei and heavier require energy to be put in to undergo fusion, so these just collect in the center of a star.

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Sayless
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(Original post by majmuh24)
The forces aren't balanced. It does run out of elements to fuse as iron nuclei and heavier require energy to be put in to undergo fusion, so these just collect in the center of a star.

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ok i now understand i changed my answer a lot now can you take a look please

Hydrogen and helium are attracted to each other by a gravitational force, as time goes on the density of the particles increase at the same time as the hydrogen and helium get closer together. Over a few billion years these elements are able to produce protostars. Fusion then occurs to produce a main sequence star because of the large amount of gravity and heat. Then when the main sequence star runs out of hydrogen it begins to cool, the fusion reactions decrease and it swells into a red giant the red giant has to perform fusion with elements heavier than hydrogen and helium in order to keep the forces in the star balanced. After the red giant runs out of heavier elements to fuse it then shrinks into a white dwarf, it collapses under the force of gravity. At the end when most of the energy has been released, a black dwarf is formed, this is the end of the lifecycle of a star like the Sun.
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yesyesyesno
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(Original post by Sayless)
ok i now understand i changed my answer a lot now can you take a look please

Hydrogen and helium are attracted to each other by a gravitational force, as time goes on the density of the particles increase at the same time as the hydrogen and helium get closer together. Over a few billion years these elements are able to produce protostars. Fusion then occurs to produce a main sequence star because of the large amount of gravity and heat. Then when the main sequence star runs out of hydrogen it begins to cool, the fusion reactions decrease and it swells into a red giant the red giant has to perform fusion with elements heavier than hydrogen and helium in order to keep the forces in the star balanced. After the red giant runs out of heavier elements to fuse it then shrinks into a white dwarf, it collapses under the force of gravity. At the end when most of the energy has been released, a black dwarf is formed, this is the end of the lifecycle of a star like the Sun.
would this get 6 marks???
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ramo77
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(Original post by Dneep)
p2 6 marker could be the life cycle of a star bigger than our sun
It's unlikely. They have already done that (I'm sure).
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MrVirtuoso
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All this talk about stars has just reminded me I need to revise that topic...
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Covington4
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does anyone have the January 2014 exam paper for p2?
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Eddard Stark
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I just hope it's not like the biology exam filled with how science works questions!
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Dneep
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(Original post by ramo77)
It's unlikely. They have already done that (I'm sure).
It could be an ISA-themed question, perhaps an investigation of some sort.
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