This Science Olympiad for HigherAbility Advanced Learners Challenging Guide and Practice Book series is targeted to guide students in acing the Singapore Primary Science Olympiad (SPSO) competition held annually.The worked examples and questions in this book will definitely spur students to learn science concepts in an engaging manner by boosting their reasoning capacities, including creative, critical and intellectual skills. Students will learn to use rational thinking to understand the problems more deeply, as the scientific facts are presented in an intriguing manner. This improves their problemsolving skills and challenges them to think analytically.Answers with explanations can be found at the end of the book.