WJEC GCSE Chemistry Practice Exam

The main practical skills being assessed are planning experiments, performing them safely and accurately, analysing the data collected, and evaluating the investigations. Planning involves deciding what to change, choosing suitable variables and controls, selecting appropriate measurements, and considering safety. Performing means carrying out the plan with careful technique, using equipment correctly, obtaining precise measurements, and following risk assessments. Analysing data is about turning measurements into meaningful information—calculating averages or rates, spotting trends, and checking for consistency. Evaluating experiments looks at sources of error, reliability and validity of results, and how the method could be improved. Practising all these together helps students design and carry out investigations, produce trustworthy evidence, and justify their conclusions, which is essential for GCSE success and real-world laboratory work.