GCSE Science Exam Technique — What Actually Earns Marks

Decode the command words first

Every Science exam question opens with a command word, and each has a specific meaning tied to the mark scheme:

• State / Give / Name: one-word or one-line answer. No explanation needed.
• Describe: say what happens, in order, with detail.
• Explain: describe AND give the reason why.
• Compare: state similarities AND differences (both, or lose half the marks).
• Suggest: apply knowledge to a new context. Multiple valid answers.
• Evaluate: pros, cons, and a judgement.
• Calculate: show working AND state the answer with units.

Ignoring the command word is the single most common technique error. "Explain" answered with a description loses half the marks — even if the description is correct.

The 6-mark answer structure

6-mark questions are marked against a specific set of assessment points, not by prose quality. The technique:

1. Read the question. Underline the command word.
2. Brain-dump 6-8 relevant scientific points on scrap.
3. Order them logically.
4. Write them as bullet points or short sentences.
5. Every point should be a distinct scientific fact — not a repeat.

A 6-mark answer of 5 short bullets earns more than 300 words of flowing prose that repeats the same 3 ideas.

Show units, always

"20" scores nothing. "20 m/s" scores full marks. Units are worth a mark on almost every calculation question. Circle the required unit in the question before you start.

Significant figures matter

"Give your answer to 3 significant figures" isn't decorative. Wrong sig figs = lost mark, even with the correct numerical value.

The graph question checklist

When asked to draw a graph: axes labelled with quantity AND unit, sensible scale, points plotted with small crosses, line of best fit (curved or straight — read the data). Missing any of these = lost marks even with correct plotting.

Timing

~1 minute per mark, with 5-10 minutes spare at the end for review. If a 4-mark question has eaten 8 minutes, move on — you'll lose more marks on later questions by lingering.

The application question trap

The last question or two on each paper often describes an unfamiliar scenario — a new plant, a novel material, a new experiment. Students panic because "we didn't cover this in class." The mark scheme wants known principles applied to a new context. Recognise the pattern, translate the scenario into familiar terms, and apply what you already know.

The mistake pattern that costs Grade 6 students Grade 7

Answering only half the question. "Compare and evaluate" needs both. "Describe and explain" needs both. Read every question through the lens of "how many things is it actually asking?" — then answer all of them.

Building the habit

Exam technique doesn't develop from reading about it. It develops from doing past-paper questions weekly for 8+ weeks with someone who marks honestly against the mark scheme and points out the technique errors in real time. That feedback loop is exactly what a good tutor delivers — and what solo revision usually can't.