Ocr Gateway Additional Science C3 B3 P3 15th june Unofficial Markscheme

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Original post by Mattyates2000

I thought it was option D as it had 30 degrees in 5 minutes and so in 10 minutes it would have rised to 60 degrees which is more than 56 in under 12 mins. For option A it was only for 200g of food and not 227g

I chose option B. This question is a mystery.

Reply 41

mae310

I thought it was option D too. What did everyone get for the second part of Janna's steps (the Thursday question)?

(edited 7 years ago)

Reply 42

Habiba12

Original post by GCSEICT

I put mitosis and for the first question I didn't round the number up and for the breathing problem one I said a reduction in gene pool or something and diseases are passed on if one organism has it

i talked about interbreeding for the pug question

Reply 43

Revision120

What was the last question on physics? Was it the kinetic energy

Reply 44

Reji

Original post by Revision120

What was the last question on physics? Was it the kinetic energy

Hi for anyone wondering what the last question is its he/she is wrong.WHen you double the mass the kinetic energy is doubled. When the speed is doubled the kinetic energy is quadrupled. Being in a van would be (double mass and double speed) so the kinetic energy would be to the power of 6 not four times.. SO the answer is no

Reply 45

Eduard-Student

For the 1st question i rounded it to 87% ...

Reply 46

Oubbz

Anyone want to come for a blaze after the exams?

Reply 47

Revision120

Original post by Reji

I got that wrong then

Reply 48

Ielite

Btw for the sperm cell question I think I did not spell meiosis properly but wrote mieosis would I still get a mark if it's not the right spelling?

Reply 49

hallam1212

Original post by Eduard-Student

For the 1st question i rounded it to 87% ...

I don't see how you can round up to 87 from 86.38? How did you work it out?

Reply 50

hallam1212

Original post by ~Lily~

I chose option B. This question is a mystery.

I thought it was D in fairness... I can't wait for results day!!

Reply 51

Eduard-Student

Original post by hallam1212

I don't see how you can round up to 87 from 86.38? How did you work it out?

220 - 29 = 191

191 / 220 x 100 = 86.8... , rounding to 87.

Reply 52

~Lily~

Original post by Eduard-Student

220 - 29 = 191

191 / 220 x 100 = 86.8... , rounding to 87.

I got 86.38 and rounded it up to 86.4. I guess our calculators have given us wierd answers. But now my calculator shows uour amswer and i domt get how it could have given me my previous answer...wth. Somethings not right here?

Reply 53

hallam1212

Original post by ~Lily~

It asks us to work out something to do with cycling... I can't remember the exact question but I did :

220-29=191
165/191 = 86.38%

Reply 54

Revision120

Original post by Ielite

Btw for the sperm cell question I think I did not spell meiosis properly but wrote mieosis would I still get a mark if it's not the right spelling?

As long as you didn't put a "t" in it then you'll get the mark

Reply 55

Revision120

Original post by ~Lily~

Same as me

Reply 56

he.be

Original post by failureofaperson

Hey on the 6 marker about the methods to make drugs I'm pretty sure that method D isn't right because it has a high atom economy and that's unwanted

I thought you wanted a high atom economy because that means more product is produced, and therefore there is less waste produce?

Reply 57

Evilstr99

Original post by he.be

I thought you wanted a high atom economy because that means more product is produced, and therefore there is less waste produce?

You are correct. People aim to maximise atom economy, meaning less waste is produced, therefore not adding to costs either. Thus, making the process sustainable.

Reply 58

Habiba12

unit 4 tomorrow-good luck!
absolutely dreading it though

Reply 59

Evilstr99

Original post by Habiba12

unit 4 tomorrow-good luck!
absolutely dreading it though

Chemistry is the one I have to look out for. I didn't necessarily understand the concept at school so hopefully, those last couple days of familiarising myself will do the trick.