Questions with 1, 2, 3 or 4 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.
Some questions start with the command words 'describe', 'explain' or 'compare'. These are often worth two or more marks:
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.
Some of the answers are shown here 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.
These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.
Give one reason to explain why diamond is used in dentists' drills. [1 mark]
Diamond is very hard. 
Figure 1 shows the structure of an alloy.
Explain why this alloy is harder than the pure metal Y. [2 marks]
Explain how a covalent bond holds two atoms together. [2 marks]
There is an electrostatic force of attraction between a shared pair of negatively charged electrons  and two positively charged nuclei. 
Explain, in terms of its structure, why graphite can be used as a lubricant. [3 marks]
The carbon atoms in graphite are arranged in layers. 
There are only weak intermolecular forces between the layers. 
The layers can slide over each other.