OCR A2 geology

Original post by behindblueglass

I messed up...

At least you didnt spell subsidence with an a :frown:

Reply 81

Willrichards101

cool

What about the carbon thirteen graph thingy? haha

Reply 82

Original post by Wombat96

At least you didnt spell subsidence with an a :frown:

Thats very true, i did how ever say in this exam that the compound eye of the trilobite was a defensive feature...not sure how I feel about this :P

Reply 83

Original post by Wombat96

At least you didnt spell subsidence with an a :frown:

At least you didn't spell subsidence as subsisdence >.> I had such a mini argument in my head about whether it was subsidence to subsisdence and I realised that I was thinking of subsistence as in subsistence farming ~_~ I feel so stupid :frown:

Reply 84

Original post by Willrichards101

cool

What about the carbon thirteen graph thingy? haha

Colder climate -> ice caps -> eustatic regression (lower sea level)
regression -> reduced shallow marine habitat (cont. shelf) -> brachiopods depleted
Colder -> less biomass -> less C12 being used up by plants (for photosynth.) -> greater ratio of C12 -> lower ratio of C13

Reply 85

Original post by Wombat96

Colder climate -> ice caps -> eustatic regression (lower sea level)
regression -> reduced shallow marine habitat (cont. shelf) -> brachiopods depleted
Colder -> less biomass -> less C12 being used up by plants (for photosynth.) -> greater ratio of C12 -> lower ratio of C13

Sorry to but it in but where was this graph? Could you let me know what it was after or before please?

Reply 86

Original post by EmilyStrange13

Sorry to but it in but where was this graph? Could you let me know what it was after or before please?

errrrr im not sure :P i wanna say about the middle?
It was three vertical graphs side by side

Reply 87

Original post by Wombat96

errrrr im not sure :P i wanna say about the middle?
It was three vertical graphs side by side

Omg I don't remember them... What was on the opposite of the paper? I'm wondering whether I've missed out a page! Dx

Reply 88

Willrichards101

Original post by EmilyStrange13

Omg I don't remember them... What was on the opposite of the paper? I'm wondering whether I've missed out a page! Dx

The page next to it was the isostatic/eustatic questions if I remember

Reply 89

ImageUploadedByStudent Room1402430319.381965.jpg

like this

Posted from TSR Mobile

Reply 90

Original post by Willrichards101

The page next to it was the isostatic/eustatic questions if I remember

Oh okay, thank you! I do remember doing those questions, phew... I thought I missed a page out or something! I do vaguely remember a graph but I was running out of time so I didn't look at it for very long which explains why I was questioning where the graph was haha

Reply 91

Zozzy

OP

2

Original post by Wombat96

I think about 0.0215 or something

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Yeah I'm pretty sure thats the right answer me and my friends got that too :smile:

.

Reply 92

Zozzy

OP

2

See I'm hoping for low grade boundaries on this paper because although it may have seemed an easy paper (for some reason lots of people at my school found it easy) I found it ok but I noticed for a lot of the questions you had to do a lot for just a few marks like the trace fossil question was only one mark, so was the habitats for the limestone question and then you had to mention four detailed things about corals for only three marks. So when you look at it like that it was actually quite easy to start dropping a few marks which is why I think grade boundaries may be nice and low :smile:

.

Reply 93

Original post by Zozzy

See I'm hoping for low grade boundaries on this paper because although it may have seemed an easy paper (for some reason lots of people at my school found it easy) I found it ok but I noticed for a lot of the questions you had to do a lot for just a few marks like the trace fossil question was only one mark, so was the habitats for the limestone question and then you had to mention four detailed things about corals for only three marks. So when you look at it like that it was actually quite easy to start dropping a few marks which is why I think grade boundaries may be nice and low :smile:

.

I agree with you! There wasn't even enough space for that question on mentioning four detailed things about corals! It was so silly that the majority of the questions were 2/3 mark questions T.T I see what you mean, I can't wait till the grade boundaries are released!

Reply 94

Chrisd00100

For the trilobite with better vision it was te one that had the compound eyes... I said because it allows it to see forwards sideways and backwards then say 180 degrees in brackets *facepalm*
Knew there was one that had the 360 degrees but then thought that would have to allow it to see downwards...

The people aiming for higher grades in my class found it alright, the others found it hard..

Reply 95

what did you guys say about the different spines on the two trilobites. I just wrote that the first one had longer spines...

Reply 96

Original post by behindblueglass

what did you guys say about the different spines on the two trilobites. I just wrote that the first one had longer spines...

Think i mentioned how the pleura ended in spines too, the genal spines seemed pretty similar to me. Left one had a smooth edged pygidium, right one had separated spines coming off it

Reply 97

Original post by Wombat96

Think i mentioned how the pleura ended in spines too, the genal spines seemed pretty similar to me. Left one had a smooth edged pygidium, right one had separated spines coming off it

Well it looks like this exam sucked for me :/
I wanted to get a A I got an A for As last year with 88% on rocks...
Now may need to go some calculations and see what I need ect :/

Reply 98

Original post by behindblueglass

Well it looks like this exam sucked for me :/
I wanted to get a A I got an A for As last year with 88% on rocks...
Now may need to go some calculations and see what I need ect :/

Do you need an A or just want it? :wink:

Reply 99