GCSE science command words explained

GCSE science command words are the verbs in exam questions that tell you what kind of answer is expected. They can be the difference between a short factual response and a longer answer that needs reasoning.

Knowing the content matters first. But once the content is there, command words help you show it in the form the mark scheme is likely to reward.

Why command words matter

A student can know the right science but lose marks by answering the wrong task.

For example:

• “State” usually asks for a short fact.
• “Describe” asks what happens or what is shown.
• “Explain” asks why it happens, often using scientific ideas.
• “Compare” asks for similarities and differences.
• “Evaluate” asks for a judgement using evidence.

Exam boards can define terms slightly differently, so it is still worth checking your specification and teacher guidance. The revision principle is the same: practise the demand of the command word, not only the topic.

Common GCSE science command words

Command word	What it usually asks for	Useful revision task
State, name, identify	A short fact, label, or value	Quick recall cards or one-line answers
Describe	What happens, what is shown, or a pattern	Write the process from memory
Explain	Why something happens using science	Link cause and effect with key terms
Calculate	A numerical answer with working	Practise formula use and units
Compare	Similarities and differences	Make paired points for both items
Evaluate	A supported judgement	Weigh evidence, limits, and conclusion

State, name, and identify

These command words usually suit short recall practice. For GCSE science, that might mean naming a structure in a cell, identifying a variable, or stating an equation.

The revision mistake is to overcomplicate them. Practise giving the cleanest correct answer.

Describe and explain

“Describe” and “explain” are often confused.

Describe is usually about what happens. Explain is usually about why it happens.

For example, describing a graph might mean saying that the rate increases then levels off. Explaining it might require collision theory, enzyme active sites, or limiting factors, depending on the topic.

This is where active recall for GCSE science is helpful. Try answering from memory first, then check whether your answer used the right scientific reason.

Compare, calculate, and evaluate

Some command words need structure.

For compare questions, avoid writing everything about one item and then everything about another. Paired comparisons are usually clearer.

For calculate questions, show working, units, and substitutions where appropriate. If a formula triangle helps you start, use it, but practise recognising which quantities the question gives you.

For evaluate questions, revision should include judgement. It is not enough to list positives and negatives. You need to decide what the evidence suggests.

How Studia uses command-word demand

Studia is built to schedule focused revision sessions, not only topic labels. A topic can be easy at recall level but harder when the task asks you to explain, compare, calculate, or evaluate.

If you are planning revision manually, combine this guide with a GCSE science revision timetable. If you want the app to help plan those sessions, see the GCSE science revision app guide.