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, any variation in values must be small.

Repeating a scientific investigation makes it more reliable.

Example

Practical B3 - Investigating the effect of temperature on the action of an enzyme

Accuracy can be improved by using a syringe to measure liquids rather than a measuring cylinder.

Reliability can be improved by completing each temperature more than once and calculating an average.