Unit 5 Revealing Nature -Developingideas ppt课件-（2019）新外研版高中英语选择性必修第一册.pptx

1、教学材料：外研版高中英语新教材选修第一册教学材料：外研版高中英语新教材选修第一册教学内容：教学内容：Unit5 Revealing Nature第四课时：第四课时：Developing ideas执教人：执教人： The Secret Language of PlantsDeveloping ideasTalking plants have long been a thing of myths and legends. Marco poloAlexander the GreatAlexander the Great and Marco Polo were said to have visite

2、d a talking tree in India. Look at the pictures and tick what plants can do . .pattackpbreathepeatpsleeppmovepspeakpstealpthink Read the passage and find out theways in which plants communicate.1 Read the passage and talk about how plants communicate.(3 ways)The plant releases chemicalsWhen another

3、plant detects the chemicals , it starts toUsing sound Some plants make noises A chilli plant can Some trees make Plants can This fungal network links Plants can 2 Think about and discuss the following ways of communication in the animal world. What other ways can you think of?马桶猪笼草马桶猪笼草 is used . It

4、 can make descriptions more vivid.1 What figure of speech is being used when the plants are described as calling for help? What is its function?Think & Share “Wood wide web” refers to an amazing system of communication that can link nearly every plant in a forest. It is linked underground by fungi a

5、nd 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. It will help us know more about the world of plants and then get a better understanding of the secret of nature and encourage us to explore m

6、ore about the mysterious nature. Whats more, it will teach us an important lesson, that is, human should live in harmony with mother nature. And it is our responsibility to fulfill the mission. Scientists are learning the secret ways in which plants “talk” to each other. It has been known for some t

7、ime 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

8、 away. 直击高考直击高考 to communicate attacked are being eaten a its大地翅膀大地翅膀 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 hav

9、e 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.龙血树龙血树Surprisingly indicating amazing which with W

10、riting an observational journalRead the observational journal and answer the questions.1.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 f

11、lowers look like? The flowers are yellow and white, and shaped like trumpets.Look at the pictures and talk about how the sunflower grows.Write your observational journal about the sunflower.An observational journal about the sunflower1 JuneGermination （使发芽） Covered with 1/2 cm of moist soil, the sun

12、flower 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 JulyGrowth The root continues to grow downward. The single s

13、tem grows hollow and smooth, revealing large spade-shaped leaves from the growing tip. Gradually, the plants growing tip reveals the first hints of development of the flower bud. The plant stem becomes more woody.26 JulyFlowering About three weeks after the flower bud first becomes visible at the ti

14、p 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 HistoryNational Museum of Natural History, Washington, DC Natural History Museum, LondonIf you want to investigate more information about nature, you can visit a natural history museum. If it isnt possible for you to do this, visit its website. Here are some options:Can you understand my language?