化学是一门自然科学,是中学阶段的一门必修课,它是古往今来无数中外化学家的化学科学研究和实践的成果。初三学生不仅能学到初中阶段的系统的化学基础知识,而且通过化学科目的学习能提高自己的观察能力、思维能力、实验能力和自学能力,为今后学习高中化学及其他学科打下良好的基础。 Chemistry is a natural science, is a required course in secondary school, it is the result of countless Chinese and foreign chemists from ancient to modern research and practice of chemical science. The third grade students can not only learn the basic chemical knowledge of junior high school, but also improve their observation ability, thinking ability, experimental ability and self-learning ability through the study of chemistry subjects so as to lay a good foundation for further study of senior high school chemistry and other subjects .