Lower Block (Primary 3 & 4) Comprehensive Science Guide is a series of five books written based on the five themes stated in the latest Primary Science syllabus. The five themes are: Diversity, Systems, Interactions, Cycles, and Energy. These themes encompass a core body of concepts in both the life and physical sciences. It aims to provide pupils with opportunities to apply concepts and integrate skills such as observing, comparing, classifying, inferring, formulating hypothesis, predicting, analysing, generating possibilities and evaluating to inquire about Science around them.It provides in-depth information for use as a reference in homework assignments and for revision in preparation for tests.