GCSE OCR 21st Century Triple Science (CBP1-7) Thread Watch

olmyster911
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#1341
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#1341
(Original post by ganners28)
Yeah, that's right, I think! The more current, the more energy, the more light?
That's not the case though :confused:
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mmaryam
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#1342
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#1342
Is it possible for a 6 marker to come up on how nuclear reactor works?

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ganners28
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#1343
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#1343
(Original post by olmyster911)
That's not the case though :confused:
In what situation? That doesn't actually work, or the science is incorrect?

Ah, i'm confused now, too!
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User1452521
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#1344
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#1344
(Original post by mmaryam)
Is it possible for a 6 marker to come up on how nuclear reactor works?

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They can literally make a 6 marker on anything


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KJC79
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#1345
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#1345
(Original post by saeranee)
can someone make a list of all the formlae for P4 please??
I'm so bad with calculations but, they will be at the front of the paper
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olmyster911
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#1346
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#1346
(Original post by ganners28)
In what situation? That doesn't actually work, or the science is incorrect?

Ah, i'm confused now, too!
"In darkness the resistance is highest which makes it useful for automatic night lights" :confused:
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ganners28
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#1347
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#1347
(Original post by olmyster911)
That's not the case though :confused:
This website explains it pretty well..

http://www.bbc.co.uk/schools/gcsebit...ancerev6.shtml

I think we're getting confused. We don't control LDR's; they control the light intensity within a circuit. If we wanted to control light, we would add more bulbs to the circuit.
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ganners28
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#1348
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(Original post by olmyster911)
"In darkness the resistance is highest which makes it useful for automatic night lights" :confused:
That makes sense, I think. The more light a component has, the greater the energy and current it has. Therefore, the resistance is low.

Conversely, if there isn't a lot of light, the current is reduced and the resistance is highest.
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olmyster911
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#1349
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#1349
(Original post by ganners28)
This website explains it pretty well..

http://www.bbc.co.uk/schools/gcsebit...ancerev6.shtml

I think we're getting confused. We don't control LDR's; they control the light intensity within a circuit. If we wanted to control light, we would add more bulbs to the circuit.
I think I understand it a bit more now! I still hope it doesn't come up in the exam though..
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ganners28
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(Original post by olmyster911)
I think I understand it a bit more now! I still hope it doesn't come up in the exam though..
Me too! Can you imagine if it happened to be a 6 mark question! :O
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lyricalvibe
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#1351
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#1351
Do we have to learn the sierverts chart?
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olmyster911
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#1352
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#1352
(Original post by ganners28)
Me too! Can you imagine if it happened to be a 6 mark question! :O
I'd have a meltdown xD

I absolutely hate P5 more than any other topic!
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Sulfur
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#1353
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#1353
Guys this is about about B456 (yes I know we finished that exam...) but I have one question. For the last six marker on the squirrel, should you have mentioned about the CNS (brain and spinal cord, also mentioned about synapse between sensory and relay) or not? If you did and it's wrong, how many marks do you think that you'd lose?
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lyricalvibe
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(Original post by ToLiveInADream)
I'm awful at P5..but isn't that step-down transformers? It lowers the current and increases the voltage through electromagnetic induction so it can travel through the national grid to houses. And there's just an AC current across the primary coil which induces the all important STEP-DOWN on the 2nd coil.
Thanks
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lyricalvibe
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(Original post by Sulfur)
Guys this is about about B456 (yes I know we finished that exam...) but I have one question. For the last six marker on the squirrel, should you have mentioned about the CNS (brain and spinal cord, also mentioned about synapse between sensory and relay) or not? If you did and it's wrong, how many marks do you think that you'd lose?
I think you did have to mention it and relate it to the reflex arc with what you said about relay neurons I accidentally talked about the relay neuron as though it's separate from the cns
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lyricalvibe
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#1356
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#1356
(Original post by olmyster911)
um..since I last replied to you I've done....nothing wbu
P6 last page bring on p4!
You?
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lyricalvibe
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#1357
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#1357
(Original post by physicalgraffiti)
It's just one of those subjects that's so interesting yet puzzling at the same time
:yep: I find things like p6 interesting while p5 and it's circuits are just annoying -_- although I have grown fond of the motor effect :/
You doing it at A-level then?
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DDan123
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#1358
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#1358
(Original post by Sulfur)
Guys this is about about B456 (yes I know we finished that exam...) but I have one question. For the last six marker on the squirrel, should you have mentioned about the CNS (brain and spinal cord, also mentioned about synapse between sensory and relay) or not? If you did and it's wrong, how many marks do you think that you'd lose?
I'm pretty sure that the 6 marker explicitly emphasised a "rapid response" which is characteristic for reflex responses, so you talk about the reflex arc.
Btw, am I the actually the only one who doesn't loathe P5
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olmyster911
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#1359
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#1359
(Original post by lyricalvibe)
P6 last page bring on p4!
You?
I'M STILL ON P5 hahaha
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olmyster911
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#1360
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#1360
(Original post by DDan123)
Btw, am I the actually the only one who doesn't loathe P5
What are you, satan?
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