Well it means design an experiment - so you could(should) include: Aim, hypothesis, apparatus, method, results, conclusion, discussion
You should of done 'scientific method', so just use that to go by.
Also note your:
i) Dependent Variable - What you expect to see a change in.
ii) Independent Variable - What you change on purpose to get you dependant variable.
ii) Controlled variables - variables that are constant throughtout the experiment.
For graphing - if required:
In the graphing of data, the dependent variable goes on the y-axis,while the independent variable goes on the x-axis.