Help, i'm about to cry!!!! Who's done astronomy gcse?

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I'm doing my astronomy GCSE and I'm stuck on what to do for my coursework. I only have 2 weeks to prepare it and I'm really worried. here is the list of the observations I can pick from. http://www.planeteartheducation.co.u...coursework.htm

For my unaided I've decided to do shadow stick and for my aided constellation photography or drawings of messier objects but I don't know what to write about and how to start it. Also no one in my school does it so I have no support or help. If anybody could recommend me what observations I could do and how to start doing them it will be very appreciated. I REALLY want an A*!!! xxxxxx

Anyone whose done it before, can you please guide me, I'm really confused and I don't want to drop it cuz my mum has paid for me to do the course and I don't want it to go to waste. HELP MEEEEEEE!!!!!!!!!!!!!!!

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Sena5

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http://www.thestudentroom.co.uk/show....php?t=1758108

http://www.astronomygcse.co.uk/Astro...e/IndexNew.htm

http://www.skyatnightmagazine.com/fo...se-t98144.html

http://www.markedbyteachers.com/gcse...oursework.html

http://www.schoolsobservatory.org.uk/activ/gcseb1

http://www.worldofteaching.com/power...rShower.ppt‎

http://www.staffordgrammar.co.uk/use...20Features.pdf

http://www.rmg.co.uk/sites/default/f...eor_Shower.pdf

http://teachingnotes.co.uk/Mike%20Wa...p%20advice.pdf

http://www.rmg.co.uk/sites/default/f...tellations.pdf

http://www.casalazarza.co.uk/ccgcsecwk.htm

http://www.edexcel.com/migrationdocu...20-%20Spec.pdf

http://www.astronomygcse.co.uk/AstroGCSE/Coursework.htm

and don't worry there are many friends on TSR who are in the same situation as yours. Get along with them in the link below.

http://www.thestudentroom.co.uk/show....php?t=2533103

http://www.thestudentroom.co.uk/show....php?t=2297283

http://www.thestudentroom.co.uk/show....php?t=2158315

http://www.markedbyteachers.com/gcse...otography.html

http://www.schoolsobservatory.org.uk/obs/go

http://www.edexcel.com/quals/gcse/gc...ssessment.aspx

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Sena5

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http://www.thestudentroom.co.uk/show....php?t=2534320

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Terrier

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(Original post by Sena5)
http://www.thestudentroom.co.uk/show....php?t=1758108

http://www.astronomygcse.co.uk/Astro...e/IndexNew.htm

http://www.skyatnightmagazine.com/fo...se-t98144.html

http://www.markedbyteachers.com/gcse...oursework.html

http://www.schoolsobservatory.org.uk/activ/gcseb1

http://www.worldofteaching.com/power...rShower.ppt‎

http://www.staffordgrammar.co.uk/use...20Features.pdf

http://www.rmg.co.uk/sites/default/f...eor_Shower.pdf

http://teachingnotes.co.uk/Mike%20Wa...p%20advice.pdf

http://www.rmg.co.uk/sites/default/f...tellations.pdf

http://www.casalazarza.co.uk/ccgcsecwk.htm

http://www.edexcel.com/migrationdocu...20-%20Spec.pdf

http://www.astronomygcse.co.uk/AstroGCSE/Coursework.htm

and don't worry there are many friends on TSR who are in the same situation as yours. Get along with them in the link below.

http://www.thestudentroom.co.uk/show....php?t=2533103

http://www.thestudentroom.co.uk/show....php?t=2297283

http://www.thestudentroom.co.uk/show....php?t=2158315

http://www.markedbyteachers.com/gcse...otography.html

http://www.schoolsobservatory.org.uk/obs/go

http://www.edexcel.com/quals/gcse/gc...ssessment.aspx

I'm using www.astronomygcse.cf it has past papers and revison stuff

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beccadf1

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How did everyone find the exam today???

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lilacpotato

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(Original post by beccadf1)
How did everyone find the exam today???

I thought was a pretty harsh paper, what about you?

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lilacpotato

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(Original post by beccadf1)
How did everyone find the exam today???

I thought it was a pretty harsh paper, what about you?

Posted from TSR Mobile

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beccadf1

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I agree, it was very harsh. It was nothing like any of the past papers and most of the questions heavily relied on you applying your knowledge. What did you put for the size of the planet question?

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Selena22

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does anyone have an idea of what the grade boundaries will be like? It was so hard!

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lilacpotato

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(Original post by beccadf1)
I agree, it was very harsh. It was nothing like any of the past papers and most of the questions heavily relied on you applying your knowledge. What did you put for the size of the planet question?

Omg I was so confused! I think I ended up working out the size of the star instead!

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beccadf1

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The grade boundaries are only made after the exams have been marked but here are last years boundaries:
a* - 98
a - 85
b - 72
c - 59
d - 52
e - 45
f - 39
g -33

Hopefully they will be quite lenient with the grade boundaries considering how hard it was!

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beccadf1

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(Original post by lilacpotato)
Omg I was so confused! I think I ended up working out the size of the star instead!

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I put 900,000 km but i think you had to do something else as well to get 2 marks (seeing as this only dimmed the brightness by 50%)

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KiraTheSaviour

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(Original post by beccadf1)
I put 900,000 km but i think you had to do something else as well to get 2 marks (seeing as this only dimmed the brightness by 50%)

What you've done is calculated the distance the planet traversed, while blocking the star's light.

If the brightness really did dim by 50%, then:
900,000/4 = 225,000 to get the radius
225,000^2 x π =

159,038,437,500km^2
area of the visible face of the planet
Not realistic at all.
So we come to the conclusion that we need to use the 6 hour long dip in brightness and the speed of the planet to work this out.
I have no idea.. Did I misinterpret/misread the question??

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Ona2000

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I tried doing this thing you know how there is like a slow decrease as like the edge of the planet comes on and then it plateaus to a constant luminosity I took that time that that took and then used the values of the speed to work out how big it was😬 I'm not explaining it well but that's what I tried

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Andreahdlfuente

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(Original post by KiraTheSaviour)
What you've done is calculated the distance the planet traversed, while blocking the star's light.

If the brightness really did dim by 50%, then:
900,000/4 = 225,000 to get the radius
225,000^2 x π =

159,038,437,500km^2
area of the visible face of the planet
Not realistic at all.
So we come to the conclusion that we need to use the 6 hour long dip in brightness and the speed of the planet to work this out.
I have no idea.. Did I misinterpret/misread the question??

No it was much easier than that. It takes 6 hours to orbit the star at 150000km/h. Therefore the diameter of the star is 9000000km. Since it takes away 50% of the light, then the planet must cover up 50% of the star so it is 4500000km in diameter.

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Andreahdlfuente

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(Original post by Ona2000)
I tried doing this thing you know how there is like a slow decrease as like the edge of the planet comes on and then it plateaus to a constant luminosity I took that time that that took and then used the values of the speed to work out how big it was😬 I'm not explaining it well but that's what I tried

Yeah, usually the dip in the light curve is curved not flat like it was here because it's a gradual process, but I guess you just had to work with the information it gave you.i thought it was weird though. Definitely a nasty question

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ThomasRules

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(Original post by Andreahdlfuente)
Yeah, usually the dip in the light curve is curved not flat like it was here because it's a gradual process, but I guess you just had to work with the information it gave you.i thought it was weird though. Definitely a nasty question

That graph was horrible - it took twice as much time to go off the star as it did to go onto it. I got 112 500km (from the time it took to get on and off and then an average)

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Andreahdlfuente

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(Original post by ThomasRules)
That graph was horrible - it took twice as much time to go off the star as it did to go onto it. I got 112 500km (from the time it took to get on and off and then an average)

Ikr. I thought about doing something like that but then again it was only worth 2 marks, so I thought that that was too complicated.

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ThomasRules

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(Original post by Andreahdlfuente)
Ikr. I thought about doing something like that but then again it was only worth 2 marks, so I thought that that was too complicated.

Its a minute per mark though, and you can do about 5 of those multi choice questions in a minute

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Andreahdlfuente

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(Original post by ThomasRules)
Its a minute per mark though, and you can do about 5 of those multi choice questions in a minute

I don't know, I'm not really sure. I don't base myself on a minute a mark because some questions require more time than others. Usually 2 marks mean 2 steps so...idk the rest went well though

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