Remember that you will need to take a ruler and calculator into the exam.
Questions that test mathematical skills will often start with the command words like 'Calculate...', 'Determine...', 'Estimate...' and 'Measure...'. They will then include blank space for you to show your working.
When an answer to a maths question is marked:
An error carried forward means that, in questions with more than one part, your answer to a later question part will be marked according to your answer for the earlier part, even if you got this wrong. So, you could still get full marks in the later answer if your working is correct but you use the incorrect earlier answer.
If your answer has many decimal places or figures, make sure you give it to an appropriate number of decimal places or significant figures. If in doubt, match the number of decimal places or significant figures to the data given in the question.
You may be asked to give units. This may earn you an additional mark, so don’t forget to check whether you need to do this.
Maths questions might ask you to plot or complete a graph or table. When you draw a graph, make sure you:
You may be given a grid with axes labelled and scales already given. Sometimes you may be given an empty grid for you to supply your own axes. When you do this:
Questions courtesy of Eduqas.
The following table shows how the concentration of carbon dioxide in the Earth's atmosphere changed between 1750 and the year 2000.
|Year||Amount of carbon dioxide in the air/parts per million|
Describe the change in the pattern shown in the amount of CO2 in the air before and after 1900. Explain what caused the change. [3 marks]
The following table shows the sources of greenhouse gas emissions in the United States.
|Residential and commercial||11%|
Calculate the percentage of emissions from electricity generation. [2 marks]
A small minority of scientists believe that it is changes in solar activity (ie changes in the brightness and warmth of the sun) that causes global warming. The graph below shows the changes in solar activity and atmospheric temperature since 1880.
Using the information from the graph, state how well the evidence supports the argument that solar activity is the cause of global warming. [2 marks]
The graph below shows the total sulfur dioxide emissions in the UK between 1970 and 2012.
a) Use the graph to calculate the decrease in sulfur dioxide emissions in tonnes between 1994 and 2004. [1 mark]
b) Suggest and explain a possible reason for the trend shown in the graph. [2 marks]
a) 2 × 106 tonnes 
b)  for a reason and  for linked explanation: