Maths questions often start with the command words 'Calculate...' or 'Determine...'. They will then have a blank space for you to show your working. It is important that you show your working, don’t just write the answer down. Calculation errors carried forward are worked through to give credit for later working.
In some maths questions you will be required to give the units. This may earn you an additional mark. Don't forget to check whether you need to do this. Take extra care when converting between units.
Maths questions might include graphs and tables as well as calculations. Don’t forget to take a ruler and scientific calculator.
If drawing graphs, make sure you:
If you are asked to calculate an answer and it has lots of decimal places, don't forget to only use one more than the data in the question. For example, if whole numbers are given in the question, then your answer would be to one decimal place. Don't forget to check your rounding.
These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.
A student observed a cell with a microscope. The magnification of the eyepiece was x10. The magnification of the objective was x20.
What magnification was the student using?
The student measured a cell they were looking at as 0.5 mm.
Convert this into micrometres.
(1 millimetre = 1000 μm)
A student measured the change in mass of potato cylinders placed in different concentrations of salt solution. Their results are shown below.
|Concentration (mol dm-3)||0.0||0.1||0.2||0.3||0.4|
|Average change in mass (%)||+10||+2||-3||-6||-8|
Plot these points on graph paper. Draw a line of best fit.
Your graph should look like this:
(a) A student is calibrating an eyepiece graticule.
The student finds that 45 divisions on the eyepiece graticule correspond with 100 μm on the stage micrometer.
Calculate what one division of the eyepiece graticule at this magnification represents. Write your answer to two significant figures.
(b) The student then finds that the length of a protist they are examining measures 42 divisions on the eyepiece graticule.
What is the length of the protist? [2 marks]
The diameter of a red blood cell is 7 μm.
The diameter of one species of Amoeba is 0.7 mm.
Calculate the difference in order of magnitude between the two.