Unit 5 Revealing nature Developing ideas 课件-2024-2025学年高中英语外研版（2019）选择性必修第一册

Unit 5 Revealing nature DI:The Secret Language of Plants By Xu Yonggao Guanxian No.1 High School Unit 5 Revealing nature Learn to understand ,explore nature and live in harmony with nature Learn the spirit of exploring and discovering nature Using language 1:Past perfect Learn to understand biodiversity and the plants’ world Using language 2:Biodiversity Developing ideas Writing an observational journal Presenting ideas Starting out Understanding ideas Learning Objectives To master the main idea of the text and clearly describe the ways in which plants communicate. 2. To understand the text type（体裁）, master the text structure and the figure of speech(修辞) . 3. To further understand nature, and establish a positive life attitude of protecting nature . Look at the pictures and tick what plants can do. attack breathe eat sleep move speak steal think √ √ √ √ Lead-in Read the passage and find out the ways in which plants communicate. They may communicate with each other by using chemicals, sound and “wood wide web”. read for main idea Skim reading(略读）is a good way to get the main idea . part 1 Para1-2 part 2 part 3 Plants can communicate. Para3-5 Para 6 Plants have various ways to communicate. Scientists are learning more about plants’ language. Introduction and thesis statement main body conclusion exposition Read for structure Introduction thesis statement main body (para.3-5) conclusion what how what Complete the diagram. communicate with each other from the leaves release its own, different chemicals with their roots tell if a neighbouring plant is helpful, or unfriendly clicking noises when there is not enough water, indicating drought is arriving. the roots of different plants to each other share information and even food steal food from each other, or spread poisons Read for information 1 Talking plants have long been a thing of myths and legends.Many cultures have stories of talkingtrees that give advice as well as warnings to people. Alexander the Great and Marco Polo were said to have visited such a tree in India. And in some modern stories, such as the film Auatar, trees can communicate with animals and people. 2 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 details(para.1-2) 1.What do people think of talking plants? 2.What does the new research have found? 3.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 chemicals from its injured neighbour, it starts to release its own, different chemicals. Some of these drive insects away.Others attract insects chemicals 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. 2.What is the scientists’ hope? 1.Circle the verbs in plant warning systems and draw a flow chart (流程图） Read for details(para.3) chemicals a bean plant insects another bean plant different chemicals wasp attack release release detect drive away attract kill without pesticides(杀虫剂) surprising warning system fill in the flow chart 11 1.How can plants use sound to communicate? 2.What can we learn about chili plants? 4.More surprisingly, plants also use sound to communicate, People can't hear these sounds, but plants are making them. Some plants make noises with their roots. Corn and chilli plants do this.They also listen to the noises from other plants.A chili plant can tell if a neighbouring plant is helpful, or unfriendly. Some trees make clicking noises when there is not enough water, indicating drought is arriving. A They can make noises as well as hearing noises from other plants. B They can detect the chemicals from the neighbours and make sounds. C They have been used by scientists to observe the state of the water. D. They use sounds that can be heard by people to communicate. Read for details(para. 4) Para. 5 Full name _________________ ____________________ System for ______________among humans ______________ among plants Link every person on Earth every _______ in a forest Linked by ___________ and ___________ underground _______which links the _______ of different plants to each other Use it to share _____________ and _______with each other Cybercrime cheat someone out of his______ spread computer virus to attack others’ __________ steal ______ from each other spread _________ to ______ other plants communication communication plant cables satellites fungi roots World Wide Web Wood Wide Web communicate entertain shop information food computers money food poisons attack 5. Most surprisingly of all, plants have an amazing system of communication that can link nearly every plant in a forest. Scientists call this system the “wood wide web”. It is in some ways similar to the Internet we use. While the Internet is a worldwide network of computers linked by cables and satellites, the wood wide web is linked underground by fungi. This fungal network links the roots of different plants to each other. Using the wood wide web, plants can share information and even food with each other. For example, some pine trees can send food to smaller pine trees to help them grow. But just like our own Internet, the wood wide web has its own version of “cybercrime”. Plants can steal food from each other, or spread poisons to attack other plants. Perhaps one day scientists will learn how to create a “firewall” to help prevent these attacks within the wood wide web. create a “firewall” prevent these attacks 13 What is the writer’s attitude towards the scientific research on the secret language of plants? A. Positive B. Negative C. Neutral(中立的) D. Indifferent(漠不关心的) Scientists are learning more every day about the secret way in which plants talk to each other. Who knows? Maybe one day we will know enough about plant communication to be able to “talk” with them ourselves. Para. 6 Read for attitude 1. What figure of speech (修辞) is being used here? 2. What does personification mean? 3. What is its function? 1. This is like a warning, or a call for help: “I’m being attacked.” (para.3) 2. They also “listen” to the noises from other plants. (para.4) 3. Plants can steal food from each other, or spread poisons to attack other plants. (para.5) Learning to learn Personification means giving human characteristics to something that is not human. By using human characteristics to describe an object, animal or even a place, personification can make descriptions more vivid. Personification (拟人) Read for language appreciation 作者 (A) - ...... Use the plant warning system to grow crops without pesticides. Predict whether the drought is arriving by the sound of some trees. Make us have a better understanding of plants and encourage us to explore nature. Create a “firewall”to help prevent these attacks within the wood wide web. 1.What are the benefits of studying plant communication？ Think and Share 2.What discoveries are described in the two reading passages in this unit and what do their meanings have in common? Think and Share They all reflect that there are numerous secrets in nature that remain to be explored. reveals the discovery of evolution reveals the discovery of communication between plants Learning Objectives To master the main idea of the article and clearly describe the ways in which plants communicate. 2. To understand the text type, master the text structure and personification 3. To further understand nature, and establish a positive life attitude of protecting nature . 1. Plants can communicate by using chemicals ,sound and “wood wide web.” What have you learned? 2. This is an expository using a lot of descriptions of personification. 3. We should have a better understanding and make better use of plants to protect nature and live in harmony with nature. We have learned: Summary I can understand the main idea of the passage correctly 4 3 2 1 I can divide the passage correctly 4 3 2 1 I can retell the ways of plants’ communication well 4 3 2 1 I can collect all the sentences of personification well 4 3 2 1 I can grasp the humanity(人文）meaning the text conveys 4 3 2 1 Reflection 1.Use words and expressions you’ve learned to write an essay about how plants communicate with each other. 2.Read supplementary reading on your textbook on page 122. Homework $$