Structured questions
Structured questions with one, two, three or four marks usually start with command words. If a question starts with the command word 'state', 'give', 'name' or 'write down', it needs a short answer only. This type of question can often be answered with one word or phrase.
It is important to state, give, name or write down the number of things that the question asks for. If you write down fewer, you cannot get all the marks. If you write down more, and one is wrong, you might lose a mark.
Learn about command words with Dr Alex Lathbridge
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Understanding the different command words in your science GCSE exams.
Some structured questions start with the command words 'describe', 'explain' or 'compare'. These are often worth two or more marks:
- Describe means you should recall facts, events or processes accurately. You might need to give an account of what something looked like, or what happened.
- Explain means you need to make something clear, or state the reasons for something happening. The points in the answer must be linked together. The answer must not be a list of reasons. All the points must be relevant to the question.
- Compare means you need to describe similarities and differences between things. If you are asked to compare X and Y, write down something about X and something about Y, and give a comparison. Do not just write about X only or Y only.
More complex structured questions will be worth three or four marks. They include questions with complex descriptions and explanations, and questions in which you need to compare things.
The mark schemes given here show some answers as bullet points. This is to show clearly how a mark can be obtained. However, do not use bullet points in your answers - the points must be linked together logically.
Sample question 1 - Foundation
Question
A student added copper oxide to sulfuric acid. The reaction made copper sulfate solution. Describe how the student could obtain dry copper sulfate crystals from the solution.
[4 marks]
This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper.
The following are valid points that could be included in your answer. It is important that you do not bullet point your answer but write your sentences in full.
- Heat the solution over a water bath. [1]
- Heat until crystals start to form around the edge. [1]
- Leave for a few days until all the water has evaporated. [1]
- Dry the crystals with filter paper/in an oven. [1]
Sample question 2 - Foundation
Question
A student adds small pieces of magnesium and copper to separate test tubes of dilute acid. Compare the observations she would make in the two test tubes.
[4 marks]
This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper.
The following are valid points that could be included in your answer. It is important that you do not bullet point your answer but write your sentences in full.
- There would be rapid bubbling in the test tube with magnesium. [1]
- However, there would be no bubbling in the test tube with copper. [1]
- The magnesium would be smaller/disappear by the end of the reaction. [1]
- However, the copper would be unchanged. [1]
Sample question 3 - Higher
Question
Sulfuric acid is a strong acid. What is meant by a strong acid?
[2 marks]
This question is AQA material which is reproduced by permission of AQA.
The following are valid points that could be included in your answer. It is important that you do not bullet point your answer but write your sentences in full.
- The acid is fully ionised/all the molecules are dissociated. [1]
- This happens in aqueous solution/when dissolved in water. [1]
Sample question 4 - Higher
Question
Aluminium is extracted from aluminium oxide by electrolysis.
In the electrolysis cell, there is a mixture of aluminium oxide and molten cryolite. Explain why.
[3 marks]
This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper.
The following are valid points that could be included in your answer. It is important that you do not bullet point your answer but write your sentences in full.
- The mixture of aluminium oxide and molten cryolite melts at a lower temperature than aluminium oxide alone. [1]
- This reduces the amount of energy required by the process. [1]
- This therefore reduces costs. [1]
