19th May 2016 - OCR 21st Century Science C1 C2 C3 Exam

Really good answer. I also said they need to look at transport. I said that the eco shoes were more biodegradable and were made from biofuels, again I just made this up and I'm not 100% sure that it will be in the mark scheme. I noted the obvious things too. Lol our invigilators always make me laugh

Same here, I had visions of alkalis coming up so these were a relief (:

hydrocarbon

Same, i almost cried with happiness

Didn't think of biodegradeable! I said something about less rubber needing to be made and harvested since they were using recycled tyres.

My invigilator started moving my stationery around on my desk while I was trying to answer the shoes question so I wasn't very pleased!

I assume you put Matt's plan was better in the C2 6 mark?!

Sh*t I put molecule and I didn't get the last standard form question!!!!!

Thanks

They also talked through the French listening and distracted my friend, which was pretty unacceptable imo.

yup (: basically i said he had more precise data bc he used a ruler, it was more repeatable, he could look for outliers, other things wouldn't affect results but i said non of them used peer review. I rambled so much on that question. I don't think i made it clear enough matt was better, it was kinda hidden. What did you say?

What did people say about why did the ethene react ( or something like that) it was a 1marker and near the front

I said more precise because rulers were same length, always held in the same position due to use of stand, more accurate because he tied a mass to the ruler rather than trying to apply the force himself, which would be impossible to measure and could result in human error. Also said it was better than the first one because the human carrying out the experiment in that instance was a variable that needed to be controlled, so getting someone else to repeat that measurement wouldn't have been great as they might have held the rulers differently.

I think if you made more positive points for Matt than you did for the others, they'll probably take that to mean you thought his was the best

If you mean the one about why they burned ethyne in oxygen, I said that air only has 21% oxygen and it would therefore burn much hotter in pure oxygen, which is useful in a welding torch.

What did people say about why did the ethene react ( or something like that) it was a 1marker and near the front

I put that pure oxygen was used because there is a faster rate of reaction

If you mean the one about why they burned ethyne in oxygen, I said that air only has 21% oxygen and it would therefore burn much hotter in pure oxygen, which is useful in a welding torch.

gr8! I like the human error point u made. I mentioned accuracy and reliability as there were like 7 repeats or something and that he could make a mean. I talked about control variables too. well I talked about the disadvantages of the others (like the others aren't repeatable) and they were done by a different person each time, the force would be different and THEN i talked about advantages of Matt. Hope that's ok!!