Scientific subjects are by their nature experimental It is accordingly important that an assessment of a students knowledge and understanding of Chemistry should contain a component relating to practical work and experimental skills This booklet has been produced to help students preparing for and taking practical Examinations The material contained in this booklet does not extend the curriculum specification content Rather it seeks to help the candidate succeed in practical examination by explaining in more depth what is required of him or her in carrying out the exercises making observations and measurements with appropriate precision and recording these methodically This booklet advices candidate on how he or she should interpret explain evaluate and communicate the results of the exercises clearly and logically using relevant chemical knowledge and understanding and using appropriate specialist vocabulary