Extended open response questions require longer answers than structured questions that have fewer marks. Open response questions are usually worth six marks, but some are worth fewer marks. It is wise to plan your answer first by making some notes. This will help you to include all the key points.
To gain full marks, you need to:
Open response questions often use these command words:
Open response questions may be synoptic questions, which bring together ideas from two or more topics. For example, a question about fertilisers could include ideas about covalent substances, acids and alkalis, chemical calculations and effects on the environment.
The answers shown here give marking points as bullet points. You do not usually need to include all of them to gain full marks, but you do need to write in sentences, linking them logically and clearly.
This page contains AQA material which is reproduced by permission of AQA.
Some students want to build an electromagnet.
The students have the equipment shown in below.
Describe how the students could build an electromagnet. Include in your answer how the students should vary and test the strength of their electromagnet. [6 marks]
Details of how to make an electromagnet:
Details of how to vary the strength of the electromagnet:
Details of how to test the electromagnet:
Electromagnets are used in scrapyards to lift cars.
An electromagnet is a solenoid.
Explain why it is better to use an electromagnet rather than a permanent magnet in a scrapyard.
You should include a comparison of the properties of electromagnets and permanent magnets in your answer. [4 marks]
Explain why chlorine (Cl2) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature.
Include a description of the bonding and structure of chlorine and sodium chloride in your answer. [6 marks]