Question 1

How do I get full marks on a 6-mark question in Pearson Edexcel GCSE Chemistry?

Accepted Answer

The 6-mark questions on your Edexcel GCSE Chemistry papers are the extended open-response questions, and they are marked using a levels-of-response mark scheme. This means the examiner reads your whole answer and places it into a level based on the overall quality and depth of your reasoning, rather than simply ticking off individual points.

To reach the top level, your response needs to show clear, logical structure and draw on all three assessment objectives: demonstrating knowledge and understanding (AO1), applying that knowledge to the specific context in the question (AO2), and, where the question asks for it, analysing or evaluating (AO3). We'd suggest working through our exam practice questions and studying the model answers, since seeing what a top-level response looks like in practice is one of the most effective ways to understand exactly what the examiner is looking for.

Question 2

What do the levels in the Pearson Edexcel GCSE Chemistry mark scheme mean?

Accepted Answer

Extended open-response questions on both Edexcel GCSE Chemistry papers (1CH0) use a levels-of-response mark scheme, meaning the examiner reads your whole answer holistically and places it into a level rather than awarding one mark per fact.

The level awarded reflects the overall quality of your scientific reasoning: how well you demonstrate knowledge and understanding (AO1), apply that knowledge (AO2) and analyse or evaluate information (AO3). Higher levels reward answers that link ideas coherently, use precise scientific language and develop a clear line of argument throughout. For the exact mark ranges within each level, the published mark schemes on Pearson's website set these out in full. Our exam practice includes extended open-response questions so you can get used to writing the kind of structured, reasoned responses that reach the top levels.

Question 3

What's the difference between Cognito's exam practice and past papers?

Accepted Answer

Our exam practice is organised by topic, so if you're shaky on Topic 7 (Rates of reaction and energy changes) you can go straight there and work through questions on exactly that content, rather than hunting through a full past paper for relevant questions.

Past papers reflect the real exam experience really well because they mix questions from across the whole spec, just as Papers 1 and 2 will on the day, but that also makes them harder to use for targeted revision earlier in the course. We'd suggest using our by-topic exam practice to build confidence topic by topic first, then moving to full past papers closer to your exams to practise the stamina and timing of the real 1 hour 45 minutes per paper.

Question 4

How long should I spend on each question in the exam?

Accepted Answer

Each paper gives you 1 hour 45 minutes to answer 100 marks' worth of questions, so a reliable rule of thumb is to aim for roughly 1 minute per mark. That means a 4-mark question warrants around 4 minutes, while an extended open-response question worth 6 marks deserves closer to 6 minutes of thought and writing.

We'd suggest building in a few minutes at the end of each paper to check back over your calculations in particular, since a small arithmetic slip can cost marks even when your method is correct. Our exam practice questions are a great way to build a feel for this pace before the real thing.