Unit 5 Period 1 Starting out & Understanding ideas（课件）英语外研版2019选择性必修第一册

高中英语外研社版2019选择性必修第一册 Unit 5 Revealing nature Period 1 ： Starting out & Understanding ideas Learning objectives 1. Students can understand the text about seed - dispersal mechanisms, master relevant biological and travel - related vocabulary, and analyze complex sentences. 2. Through exploring how seeds travel, students will be able to describe the process clearly and summarize the significance of seed dispersal in nature. 3. Students can develop critical thinking by discussing the relationship between seed travel and ecological balance, and draw reasonable conclusions. 4. By learning the scientific exploration story, students will enhance their interest in nature, cultivate scientific exploration spirit, and improve cross - disciplinary learning ability. Contents 1. Lead in 2. Pre-reading 3. While-reading 4. Post-reading 5. Summary 6. Assessment 7. Homework 01. Lead in Seeds Traveling ① by itself 2. Can you think of another example of seeds travelling? ② by the wind ③ by the water ⑤ by the animals ⑥ by the insects ④ by the birds Starting out Watch the video and answer the questions What is evolution? What species do you recognise in the picture in the evolutionary tree?(P66)? What is the direction of evolution? What factors can cause the process of evolution? ? Read this picture and talk about the following topics. animals plants zebra斑马(哺乳动物） bird turtle海龟(爬行动物) fish crab 螃蟹(爬行动物) snail 蜗牛(软体动物) earthworm蚯蚓 (环节动物) flatworm(扁形动物） poaramecium草覆中(单细胞生物) frog青蛙(两栖动物) starfish(棘皮动物) jellyfish 水母腔肠动物 algae(藻类) algae(藻类) moss(苔鲜) gymnosperms裸子植物 angiosperm 被子植物 human natural selection(自然选择) the result of natural competition(自然竞争) genetic mutation (基因突变) higher forms of life lower forms of life evolve---evolution 4.What factors can cause the process of evolution? 3. What is the direction of evolution? 02. Pre-reading Read the pictures and introductions to the three animals and share your ideas with us. What does ‘unusual’ mean? Komodo dragon 科莫多蜥蜴 Duck-billed platypus 鸭嘴兽 Nautilus 鹦鹉螺 03.While-reading What so you know about these unusual animals？ Komodo dragon Komodo dragons: Komodo dragons were first encountered by Western researchers 1910. The researcher said the ancestor of the Komodo dragon most likely evolved in Australia ans spread westward, reaching the Indonesia island of Flores 900,000 years ago. 科莫多巨蜥最早是在1910年被西方研究人员发现的。研究人员说，科莫多巨蜥的祖先很可能是在澳大利亚进化而来，并向西传播，在90万年前到达印度尼西亚的弗洛雷斯岛。 Pre-reading What so you know about these unusual animals？ Duck-billed platypus The fist scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platpus dates back to about 100,000 years ago. 18世纪晚期，第一批查看保存下来的鸭嘴兽尸体的科学家判定它是赝品。 已发现的最古老的现代鸭嘴兽的化石可以追溯到大约10万年前。 Duck-billed platypus Pre-reading What so you know about these unusual animals？ Nautilus Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. It is often considered a “living fossil”. 化石记录表明，鹦鹉螺在大约5亿年的时间里相对稳定地存活了下来。经常被认为是“活化石”。 Nautilus Pre-reading Understanding ideas A journey of Discovery 1. Look at the picture and the passage title, how do you understand the title? generally: a trip from one place to another place Darwin’s research work leading to his discovery of evolution literarily: the process by which something gradually develops 事物逐渐发展的过程 Skim the passage and choose. What's the genre of the passage? Exposition Argumentation Narration What Where Who Why How Pre-reading A Journey of Discovery Darwin Question: how did different species come to exist? England → South America Galapagos Islands By ship — Beagle 1831 1835 1839 On the Origin of Species 1835 1859 Today 1831 After in the order of______ time Para 1 Para 2-5 Para6-7 Choose the main idea of the passage and give your reasons. 1　Darwin’s interest in various living things made him a great naturalist. 2　Darwin’s journey on the Beagle inspired his Theory of Evolution. 3　Darwin went on a journey to confirm his theory that humans had evolved over time. Read for detailed information He was not the captain’s _____ ______ He was a ________ to himself and all his family He was a young man who had left _____ _______ without _____ _____ ______. first choice completing his degree medical school disgrace Para 1：Labels on a young man in captain’s eyes in common people’s eyes in his father's eyes Read for detailed information Charles Darwin was a ___________ and ____________, fascinated by _____, ______ and _________. geologist naturalist rocks plants animals How did different species come to exist? samples Para 2：Start a journey who what collecting________ of plants and animals asking himself a question All species had appeared on Earth __ ____ ____ ____, and had not changed since Animals evolved as they adapted to their _______ ________ To look for more evidence Read for detailed information at the same time changing environments Para 3：Generate new ideas old ideas new ideas what how to prove These birds are different in the aspect of _______ It is because the___________________________ Beaks Food available on that particular island 27 A _________ ancestor __________ into different species common evolve a theory of evolution 28 Darwin noticed finches’ beaks had evolved according to what food was available on that particular island. New species of plants and animals evolved from ______ ______. Read for detailed information earlier ancestors Para 4-5 Develop the ideas how answer of that question ___ ____ __ _______. Darwin explained this theory in his book-- __ ___ ___ ___ _______ Read for detailed information A theory of evolution On the Origin of Species. Many people refused to believe. They were ______. Later, more and more people started to ________ his theory. Para 6 Propose a theory what how people's reaction _______ to believe people were _______ ______ to believe refused shocked started People’s reaction towards the theory 31 ___ ____ __ _______. Darwin explained this theory in his book-- __ ___ ___ ___ _______ Many people refused to believe. They were ______. Later, more and more people started to ________ his theory. Read for detailed information A theory of evolution On the Origin of Species. shocked believe Para 6 Propose a theory what how people's reaction On the Origin of Species is regarded as one of the most _________works ever written. It has changed ideas about ____ on Earth forever. Read for detailed information life important Para7 His book influence 1831 the Beagle started his journey South America, asked himself questions (generated ideas) (developed an idea) answered the question 1835 1859 published the book (proposed a theory) Darwin spent _____ years on his discovery But spent _____years publishing his Theory of Evolution in 1859 4 24 A ________ Journey of __________Discoveryby_______Darwin tough important brave perseverant Summary 34 04.Post-reading 1 2 3 4 5 He studied various living things in their natural environments and samples of plants and animals he had collected very similar to each other come to exist? Maybe animals evolved as they adapted to their changing environments ? that there was a difference between the finches on each of the island. had evolved according to what food was available on that particular island. that the finches had evolved from a common ancestor, and it had slowly evolved into many new species. had evolved from lower forms of life Can you speak out some famous Chinese Scientists? patritism 爱国精神 innovation 创新精神 truth-seeking求实精神 dedication 奉献精神 teamwork 协同精神 The spirit of Chinese scientists? Activity 8 Think and share 37 06. Summary Lead-in Summary 07.Assessment Lead-in Assessment Learning Objectives Score(1-5) 1.种子传播的方式 2.达尔文环球航行的经历和进化论的形成过程 3.重点词汇和短语 5-完全能；4-基本能；3-不确定；2不太能；1-完全不能 08. Homework Lead-in Homework 用英语写一篇短文，介绍一种自己感兴趣的种子传播方式或达尔文进化论对现代社会的影响，字数在150 - 200字左右。 Thank you for your listening Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 Multimedia Cloud Transcode (cloud.baidu.com) Lavf58.20.100 null 278798.16 $$