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课件网) 高中英语外研版2019选择性必修第一册 Period 3 ： Developing ideas & Presenting ideas Unit 5 Revealing nature Learning objectives 1. Students can keep in mind some useful expressions and understand some long sentences. 2. Students can speak out the process when plants use chemicals to communicate. 3. Develop students' interest in exploring the secrets of nature, enhance their awareness of protecting plants and the ecological environment, and cultivate cross - cultural thinking in scientific topics. What the plants can do How Lead in Watch the video and answer the questions What the plants can do How Plants can travel/sow seeds播种. Lead in ① by itself Lead-in Lead in Now talk about what else you think the plants can do and give examples. make medicine protect environment reduce noise predict the solar terms flytrap 捕蝇草 The can _____ insects. Its leaves can _____ when touched. mimosa [m m z ] 含羞草 fold up catch pea 豌豆、豆角 The can sow(播种) its own _____. seeds Look at the title and predict : plants can _____. communicate Plants can communicate with each other by using chemicals, sound and “wood wide web”. How do plants communicate --Plants can communicate by... While-reading The Secret Language of Plants Plants can communicate . Scientists are learning more about plants’ language. Para 1~2 Para 3 Para 4 Para 5 Para 6 Using chemicals Using sound Using WWW Narration(记叙文) Exposition（说明文） Argumentation（议论文） Introduction Body Conclusion Structure Genre(文体) Read for detailed information （para 1) were said to have visited a talking tree in India. trees can communicate with animals and people. Talking plants have long been a thing of myths and legends. With us long believing that talking plants are fantasy, new research has revealed something amazing: it appears that plants can communicate after all. Read for detailed information (para 2) scientific evidence Read for detailed information (para 3) Read and circle verbs describing the process of a bean plant saving itself. It has been known for some time that plants use chemicals to communicate with each other. This happens when a plant, say a bean plant, gets attacked by insects. The plant releases tiny amounts of chemicals from the leaves that are being eaten. This is like a warning, or a call for help: “I’m being attacked!”When another bean plant detects the chemicals from its injured neighbour, it starts to release its own, different chemicals. Some of these chemicals drive insects away. Others attract insects—the wasps! The wasps kill the insects that are eating the bean plants. Scientists hope to learn more about this plant warning system, so that we can use it to grow crops without pesticides. chemicals a bean plant insects another bean plant different chemicals wasp attack release detect release kill drive away attract kill fill and try to retell When being attacked by insects, a plant can save itself in a ... ...
