How to Answer 6-Mark Questions in GCSE Science
How 6-mark science questions are marked, and a simple method for planning and writing answers that reach the top level.
How they're marked
Six-mark questions are usually marked by levels: the examiner reads your whole answer and places it in a level (for example 1–2, 3–4 or 5–6 marks) based on how detailed, accurate and logically organised it is. Lots of disconnected facts won't reach the top level.
Read the command word
'Describe' means say what happens. 'Explain' means say why or how — use 'because' and 'so'. 'Compare' means give similarities and differences. 'Evaluate' means weigh up points and reach a judgement. Answering the wrong command word is the most common way to lose marks.
Plan for 30 seconds
Jot down 4–6 key points or steps before you start writing. For a practical method, think: equipment, steps in order, what you measure, how you keep it fair, how you repeat it.
Write in a logical order
Each sentence should follow from the last. Use scientific vocabulary precisely (for example 'diffusion', 'concentration gradient'). Link cause and effect clearly.
Check against a mark scheme
After practising, compare your answer to a mark scheme or level descriptor. Highlight the points you included and add the ones you missed. Repeat with a new question a few days later.