Excel Essential Skills Science Revision Workboo k Year 9 is a revised edition, with topics covering the Ye ar 9 AUSTRALIAN CURRICULUM SCIENCE COURSE. This bo ok will allow students to revise the course in a user-friendly way, impr ove their understanding of Science and help them excel in their tests, h alf-yearly exam and yearly exam.  In this book you will find: Easy-to-understand revision notes and diagrams for al l topics A wide variety of exercises to test scientific skills< /li> Revision questions to reinforce knowledge A glossary e xplaining important terms in each chapter A detailed answer sec tion CHAPTERS: Introduction  STRAND: Biological Sciences  Chapter 1: Food and livi ng things   Chapter 2: Sensing the world around you  Chapter 3: Animal reproduction Chapter 4: Infectious diseases   Test A   STRAND: Chemical Sciences Chapt er 5: Chemical reactions STRAND: Earth and Space Sciences Ch apter 6: The universe  Chapter 7: Human impact on the biospher e STRAND: Physical Sciences Chapter 8: Wave motion  Test B  Answers