This book is specially written to cover all 5 themes in the latest MOE Science syllabus Cycles, Systems, Diversity, Interactions and Energy. It contains multiple-choice questions and open-ended questions that will help to develop critical thinking and build examination confidence in students. The questions are set at a higher standard to encourage students to think about a problem at a deeper level in order to solve them. Complete solutions are provided at the end of the book for self-evaluation.