Unit 5 Revealing nature Understanding ideas 课件-2025-2026学年高中英语外研版选择性必修第一册

该高中英语课件围绕达尔文进化论的发现历程展开，从动植物分类、进化树分析导入，通过快速阅读匹配段落大意、细读梳理“旅程中-产生想法-寻找证据-提出理论”的时间脉络，搭建从现象观察到理论构建的学习支架。 其特色在于以“发现之旅”为主线，结合加拉帕戈斯群岛地雀喙部差异等实例，通过分析证据链培养思维品质，借助阅读任务（如段落结构分析、问题回答）提升语言能力，利用时间轴和总结表格优化学习策略。这不仅帮助学生理解科学探究过程，还为教师提供结构化教学方案，提升课堂效率。

B4U5 Revealing nature A Journey of Discovery (Understanding ideas) What species do you recognise in the picture? An evolutionary tree algae(藻类） moss (苔藓） fern(蕨类） gymnosperms(裸子植物） angiosperm(被子植物） paramecium (草履虫-单细胞生物） jellyfish 水母腔肠动物 flatworm (扁形动物） earthworm (蚯蚓-环节动物） snail蜗牛 (软体动物） starfish (棘皮动物） crab螃蟹 (节肢动物） fish turtle海龟 (爬行动物） frog青蛙 (两栖动物) bird zebra斑马(哺乳动物） human(哺乳动物） Plants Animals Look at the evolutionary tree and answer the questions. Evolve lower forms of life higher forms of life Lead-in An evolutionary tree water land For living places For life levels 2. What factors can cause the process of evolution? The ever-changing environment; population immigration; genetic mutation (基因突变); natural selection; … Who is he? Do you know his famous work? What is it about? Watch and answer Charles Darwin and his Theory of Evolution Charles Darwin (1809 –1882) was an English geologist and naturalist. In his famous book On the Origin of Species, Darwin proposed the theory that organisms (individual life forms) evolve extremely slowly. He stated that the organisms that were better suited to their environment would survive and pass on their favourable characteristics to the next generation, while the less suitable organisms would gradually die out. He called this process “natural selection”. 7 Who made this discovery? What is the discovery? How did he make the discovery? Charles Robert Darwin The theory of evolution The Origin of Species Pre-reading Match the parts with main ideas. Fast reading Part 1 (Paras. 1-2) Part 2 (Paras. 3-5) Part 3 (Paras. 6) Part 4 (Paras. 7) A. The remark about On the Origin of Species. B. Darwin's new theory about evolution. C. The new discoveries during the journey. D. Darwin answered the call and began his journey. Para_____ The structure 2-5 The text is organized in order of______ . Para___ Para _____ time Before the journey During the journey Decide what type of essay it is? It is a narrative essay. Fast reading After the journey 1 6-7 Read for the structure Para.1 Para.2 Para.3 Para.4 Para.5 Para.6 Para.7 Introduction Conclusion How did he make the discovery? P69 Activity 4 Introduction On his journey Generate ideas Look for more evidence Develop ideas Propose a theory Conclusion How he made the discovery. Para.1 Para.7 Para.2 Para.3 Para.4 Para.5 Para.6 1 4 2 3 5 produce put forward ▲ fascinated degree disgrace evolved ancestors Read for the structure 1. What is the function of para. 1? To praise Charles Darwin To arouse readers’ interests To introduce Charles Darwin’s achievements To inform readers of Charles Darwin’s life Careful-reading Read Para.1 and choose the correct answer. 2. Which of the following statements about Charles Darwin is True? Darwin wanted to benefit from visiting little-known countries Darwin quitted medical school due to his lack of money Darwin’s father was satisfied with Darwin Darwin’s made a significant scientific discovery thanks to his adventures on the ship Beagle Introduction 14 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 Careful reading Labels on the young man In common people’eyes In captain’eyes In families’eyes being despised 2 GENERATE IDEAS Darwin asked the questions: How did different species ___________________? __________________________________________________________________________________ come to exist Maybe animals evolved as they adapted to their changing environments? 3 LOOK FOR MORE EVIDENCE On the Galápagos Islands: He noticed ________________________________ _________________________________________. It seemed the beaks ________________________ _________________________________________. that there was a difference between the finches on each of the islands had evolved according to what food was available on that particular island The Galapagos Islands (加拉帕戈斯群岛)在厄瓜多尔西方约1000公里的太平洋上，由14个散布在赤道附近的小岛组成。 Galapagos在西班牙语中的意思就是「乌龟」。此群岛正如其名，岛上有重量超过一百公斤的象龟，使达尔文一行人大为吃惊，另外，还有长达一公尺以上的鬣蜥，这种蜥蜴有住在海岸附近的海生型及住在内陆的陆生型，且两者不属同种。 14种达尔文雀 来源：https://naturegalapagos.com/ These birds are different in the aspect of _______ It is because the___________________________ Beaks Food available on that particular island 19 A _________ ancestor __________ into different species common evolve a theory of evolution 20 4 DEVELOP IDEAS Darwin suspected that the finches _______________ ___________________________________________________________________ and it had ______________________________________________. slowly evolved into many new species had evolved from a common ancestor, which had arrived on the islands a long time before 5 PROPOSE A THEORY The Theory of Evolution: living things, including humans, ____________________________________. had evolved from lower forms of life Careful reading 1 2 3 various living things in their natural environments and samples of the 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 islands had evolved according to what food was available on that particular island Careful reading 4 5 slowly evolved into many new species had evolved from a common ancestor, which had arrived on the islands a long time before had evolved from lower forms of life Read Para.6 and choose the correct answer. _______ to believe people were _______ ______ to believe refused shocked started _______ to believe people were _______ ______ to believe refused shocked started People’s reaction towards the theory Read Para.7 and choose the correct answer. Journey on the ___________ Journey to discover _______________ The Theory of Evolution ship Beagle A Journey of Discovery ▲ (　　)1.What made Darwin start to question the existing belief about species? A.The samples he collected. B.The similar animals he saw. C.The trip to South America. D.The captain’s influence. B Post-reading (　　)2.How was Darwin’s theory of evolution received at first? A.Widely accepted. B.Totally ignored. C.Met with shock. D.Praised by all. C (　　)3.What can we infer from the article? A.Darwin was not interested in medicine. B.Darwin and his father always had a bad relationship. C.Darwin had the idea of evolution before he boarded the Beagle. D.Darwin spent many years writing On the Origin of Species. A Darwin’s interest in various living things made him a great naturalist. B. Darwin’s journey on the Beagle inspired his Theory of Evolution. C. Darwin went on a journey to confirm his theory that humans had evolved over time. 4. Choose the main idea of the passage and give your reasons. 1831 the Beagle started his journey South America, asked himself questions (generated ideas) 1835(developed an idea) answered the question 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 __________Discovery by_______Darwin tough important brave perseverant Summary dangerous revolutionary Discussion How do you think the human species will evolve in the future? ( changes in the environment, technology, social structures, and so on.) One possibility is that humans may continue to evolve physically to better adapt to our changing environment and lifestyles. Another possibility is that humans may evolve culturally and socially, rather than physically. As we continue to develop new forms of communication and interaction, our social structures and cultural practices may change in ways that shape our evolution. Ultimately, the future of human evolution is uncertain, and it is impossible to predict exactly how our species will evolve in the coming years and centuries. However, it is clear that our evolution will continue to be shaped by the choices we make and the world we create around us. Think and share What good qualities contributed to Darwin's success in scientific exploration? endurance耐力 bravery … hard work perseverance毅力 Self-belief interest courage curiosity critical thinking determination I can succeed in science, the most important thing is the love of science and insisting on long-term exploration. ---Charles Robert Darwin Darwin’s scientific spirit Thank you! Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 $