《生态系统的能量流动》包括能量流动的过程和能量流动的特点两部分内容,教学重点之一是能量流动的过程。教学中可密切结合第1节中的食物链,以此作为主线对食物链上的某一生物食物中的能量变化进行分析,教师注意引导学生运用系统的分析法,在群体水平上研究生态系统的能量流动,可以分析出能量流动的基 “Ecosystem energy flow” includes two parts: energy flow process and energy flow. One of the focuses of teaching is energy flow process. Teaching can be closely integrated with the food chain in Section 1 as the main line to analyze the energy changes in a biological food in the food chain. Teachers should pay attention to guiding students to use systematic analysis to study ecosystem energy at the group level Flow, you can analyze the flow of energy base