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

The Secret language of Plants Unit 5 Revealing nature Learning Objectives Get a better understanding of the ways in which plants communicate. Develop the ability to sort out the main idea of a para and identify the structure of expository essays. Develop a positive attitude of treasuring nature and living in harmony with nature. How do you communicate with each other? body language face to face social media Do you believe plants “talk” to each other by their own ways? They use electronical signals to communicate with each other. Warming up How do plants communicate in the video? Besides these, what others do you know about plants ? Where can we find this passage? A. In an economic book B. In a history book C. On a scientific magazine D. In a novel Fast reading Scientists hope to learn more... Scientists call this system... One day , scientists will learn... Scientists are learning... Careful reading 1．Read the first two Paras carefully and choose the right answer. What does the new research have found? A. It appears that plants can communicate. B. Talking plants are fantasy. C. Trees can communicate with animals and people in film. D. Talking plants have long been a thing of myths. Careful reading 2．Read Para 3-4 carefully and choose "T" or "F". 1．A bean plant uses sounds to communicate. 2．A bean plant uses chemicals to warn its neighbours. 3. A bean plant releases chemicals to drive the wasps. Some of these chemicals drive insects away. Others attract insects-the wasp! sounds chemicals attract drive F T F Careful reading 4．A corn plant can tell if a neighbouring plant is helpful or unfriendly. 2．Corn and chilli plants make clicking noises. corn chilli Some trees F F Corn and chilli plants The last sentence A chilli plant can tell...(line 3) Careful reading 4．What's the most surprising thing for plants in Para. 5? A．They can use the Internet. B．They have their own satellite. C．They can walk near to their friends. D．They can link nearly every plant in a forest. 5. According to para 6, what is the writer’s attitude towards the scientific research on the secret language of plants? A. Positive B. Negative C. Neutral D. Indifferent 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. Careful reading What is the writer’s purpose in writing the passage? A. To introduce the ways plants communicate with each other. B. To compare the differences between plants and humans. C. To predict where technology will take plants. D. To call on humans to protect the plants. Post-reading Post reading The Secret Language of Plants 1 The plants release chemicals from leaves that are being eaten. When another plant detects the chemicals, it starts to release its own different chemicals. Using sound Some plants make noises with their roots. 2 Using the "wood wide web" 3 .It is in some ways similar to the Internet we use. A. Some trees make clicking noises, which indicating drought is arriving. B. The fungal network links the roots of different plants to each other. C. Using chemicals. D. Others attract insects-the wasp! E. Plants can communicate after all! chemicals sound “wood wide web” Plants can communicate ______ each other, and they may use _______, _______ and ___________.Maybe one day we will know enough about plant communication to be able ____ "talk" with them ourselves. How does the writer develop the passage? with to Summary Think and share From what we have learnt, plants have their own ‘Internet’, so what should we do to protect their ‘Internet’ in our campus? Turn off the faucet. Think and share From what we have learnt, plants have their own ‘Internet’, so what should we do to protect their ‘Internet’ in our campus? No littering! Pick up litter. Assignment 1. Reread the passage and mark out the difficult phrases and sentences. 2. Finish the diagram on page 76. Scientists are learning the secret ways in which plants “talk” to each other. It has been known for some time that plants use chemicals 1_________________(communicate) with each other. When 2____________(attack) by insects, the plant releases chemicals from the leaves that 3_____________(eat) . This is like 4____ warning. When another plant detects the chemicals, it starts to release 5________(it) own, different chemicals. Some chemicals drive insects away. 直击高考 to communicate attacked are being eaten a its 大地翅膀 6____________(surprising), plants also use sound to communicate. Some plants make noises with their roots. Some trees make clicking noises when there is not enough water, 7_______________(indicate) drought is arriving. Most surprisingly of all, plants have an 8___________(amaze) system of communication that can link nearly every plant in a forest. It is called “ wood wide web”, 9_______ is in some ways similar to the Internet we use. Using the wood wide web, plants can share information and even food 10________ each other. 龙血树 Surprisingly indicating amazing which with Writing an observational journal Read the observational journal and answer the questions. How were the daffodil bulbs planted? They were planted side by side in soil with the pointed ends facing up. 2. In what environment did the leaves grow? The leaves grew in a sunny, but cool place. 3. What do the flowers look like? The flowers are yellow and white, and shaped like trumpets. Work in pairs. Look at the pictures and talk about how the sunflower grows. Write your observational journal about the sunflower. Make improvements to each other’s observational journals and share them with the class. An observational journal about the sunflower 1 June Germination （使发芽） Covered with 1/2 cm of moist soil, the sunflower seed takes five to 12 days to come up after being planted. Water has been added regularly and the hard seed coat softens in the damp soil to allow the first root to pierce downwards and the first leaves to push to the soil surface. 6 July Growth The root continues to grow downward. The single stem grows hollow and smooth, revealing large spade-shaped leaves from the growing tip. Gradually, the plant‘s growing tip reveals the first hints of development of the flower bud. The plant stem becomes more woody. 26 July Flowering About three weeks after the flower bud first becomes visible at the tip of the sunflower stem, it enlarges and begins to reveal a flattened disk. Over the course of one week, the yellow ray florets, the disk florets bloom across the core of the sunflower blossom. It is yellow, looking beautiful. Beijing Museum of Natural History National Museum of Natural History, Washington, DC Natural History Museum, London If you want to investigate more information about nature, you can visit a natural history museum. If it isn’t possible for you to do this, visit its website. Here are some options: Do you know how animals communicate with each other? How do bees communicate? They can tell others by dancing. How do ants communicate? Ants communicate by tentacles or chemicals. attack breathe eat sleep move speak steal think What do you think plants can do? Tick the boxes. Flytrap mimosa pea Now talk about what else you think plants can do and give examples. make medicine protect environment reduce noise predict the solar terms 节气 Read for the passage structure and main idea of each part Plants can communicate Plants have various ways to communicate Scientists are learning more about plants’ language Part 1 Introduction and thesis statement Part 2 Body Part 3 Conclusion Para. 1 - Para. 2 Para. 3 - Para. 5 Para. 6 Read the passage to sort out the type of writing. An exposition Read the passage and find out the ways in which plants communicate. They can communicate with each other in three ways： by using chemicals sound and “wood wide web” Modern research is showing that plants can 1_________________________. Using chemicals The plant releases chemicals 2_____________ that are being eaten. When another plant detects the chemicals, it starts to 3______________________________. communicate with each other from the leaves release its own, different chemicals Check the answers on P76 Using sound Some plants make noises 4______________. A chilli plant can 5__________________________ __________________. Some trees make 6___________________________ ______________________________________. with their roots tell if a neighbouring plant is helpful, or unfriendly clicking noises when there is not enough water, indicating drought is arriving Check the answers Using the “wood wide web” This fungal network links 7___________________________ _________. Plants can 8_____________________________ with each other. Plants can 9________________________________________ to attack other plants. the roots of different plants to each other share information and even food steal food from each other, or spread poisons Maybe one day we will be able to “talk” with plants. Check the answers What is the passage most likely to be taken from? A. A scientific magazine B. A guide book C. A fiction story D. A news report What is the writer’s purpose in writing the passage? A. To introduce the ways plants communicate with each other B. To compare the differences between plants and humans C. To predict where technology will take plants D. To call on humans to protect the plants Why do scientists do research on this plant warning system? To explore the wonders of nature To apply it into agriculture To protect plants To predict the future of plants Scientists hope to learn more about this plant warning system, so that we can use it to grow crops without pesticides. According to para 6, what is the writer’s attitude towards the scientific research on the secret language of plants? A. Positive B. Negative C. Neutral D. Indifferent 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. 1. What figure of speech is being used when the plants are described as calling for help? What is its function? 2. What does “wood wide web” mean? Share your thinking on the following questions Personification. It can make descriptions more vivid. “Wood wide web” means an amazing system of communication that can link nearly every plant in a forest. It is linked underground by fungi and 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. 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. People can have a better understanding of plants and explore more about the mysterious plants. People can make better use of plants for the benefit of mankind. 1. What are the benefits of studying plant communication？ People can better protect nature and live in harmony with nature. Think Share 2. What discoveries are described in the two reading passages in this unit? What do their meanings have in common? Passage 1 reveals the secret of evolution. Passage 2 reveals the secret of communication between plants. They all reflect that there are numerous secrets in nature that are waiting to be explored. Scientists are learning the secret ways in which plants “talk” to each other. It has been known for some time that plants use chemicals 1______________ (communicate) with each other. When 2________ (attack) by insects, the plant releases chemicals from the leaves that 3______________ (eat). This is like 4___ warning. When another plant detects the chemicals, it starts to release 5___ (it) own, different chemicals. Some chemicals drive insects away. 6____________ (surprising), plants also use sound to communicate. Some plants make noises with their roots. Some trees make clicking noises when there is not enough water, 7__________ (indicate) drought is arriving. Most surprisingly of all, plants have an 8________ (amaze) system of communication that can link nearly every plant in a forest. It is called “ wood wide web”, 9______ is in some ways similar to the Internet we use. Using the wood wide web, plants can share information and even food 10_____ each other. Surprisingly indicating amazing which with to communicate attacked are being eaten a its Complete the summary by filling correct words or correct forms of the given words. Thank you Lavf55.33.100 23 Unit 5-3 英语选择性必修第一册 2019 Other 239323.3 x264 0.128.2216+688+32 a17ff54 tMod [8-bit@4:2:0 X86] $$