Carrying out an experiment (CCEA)Obtain and record accurate, reliable results

The accuracy of a measurement is dependent on the quality of the measuring apparatus and the skill of the scientist involved.

For data to be considered reliable, repeats must be carried out.

Repeating a scientific investigation makes it more reliable.

Example

Practical B2 - Investigating the energy content of food

Accuracy can be improved by using a balance to measure the mass of food.

Reliability can be improved by completing the experiment for each food more than once and calculating an average temperature increase.