This is a highly recommended science problem book specifically designed for high school entrance exams. It allows for efficient review and exam preparation, covering the first, second, and third-year junior high school curriculum, and is divided by subject: physics, chemistry, biology, and earth science. The explanations are thorough, making it a valuable resource in our household! It's easy to read and use. Includes two mock exams. Total of 156 pages. - Title: Most Important Problems for High School Entrance Exams: Science - ISBN: 978-4-06-303976-7 - Content: Science problem book including questions on chemical reactions and mass.