The emphasis in education is shifting away from rote learning of facts to development of skills, which lead to a better understanding of concepts. Having content knowledge alone is insufficient for a student to excel. Students require keen analytical skills, a strong grasp of concepts, and efficient revision techniques to help them apply their knowledge meaning fully and score well in examinations. This book seeks to develop students' process skills in the areas of observing, comparing, classifying, using apparatus and equipment, communicating, analysing, generating possibilities, inferring, predicting, forming hypotheses and evaluating. Questions are structured to give students practice in applying basic process skills at the beginning of each diagnostic test, before integrating several skills to solve more complex problems towards the end of each test.