1 In an experiment investigating the effect of one variable on another, the independent variable is the one that you change and the depen...

One of the questions in the exam is likely to involve drawing a specimen on a slide, using a microscope, or drawing from a photomicrograp...

It is very important to understand the difference between experimental errors and 'mistakes'. A mistake is something that you do ...

Once you have collected, tabulated and displayed your results, you can use them to draw a conclusion. When you are thinking about a concl...

When you have collected your data and completed your results table, you will generally want to display the data so that anyone looking at...

You will often need to construct a table in which to record your measurements, readings and other observations. It is always best to desi...

You will often be asked to take measurements or readings. In biology, these are most likely to be length, mass, time, temperature or volu...

Many of the experiments that you will do during your AS course, and usually Question 1 in the examination paper, will investigate the eff...

Almost one quarter of the total marks for your AS examination are for experimental skills and investigations. These are assessed on Paper...