课前准备1.有关生态系统的图片资料和影像光碟2.腐烂的苹果教学过程一、生态系统的概念师:前几节课我们研究了生物与环境的相互影响,那么,你们能根据各自的理解,说一说生物与环境有着什么样的关系吗?生:在自然环境中,各种因素影响着生物,生物在生存发展中不断适应环境,同时也影 Pre-class preparation 1. Ecosystem-related picture materials and video CD 2. Decaying apple teaching process I. Ecosystem concept division: The first few lessons We studied the biological and environmental interactions, then you can according to their own Understand, to talk about the biological and the environment have what kind of relationship? Health: In the natural environment, a variety of factors affect the living creatures, living constantly adapt to the environment, but also shadow