高中英语 选必B1U5-第2课时-understanding ideas 课件

1、2021年深圳市线上课程高二英语深圳市教育科学研究院教学材料：外研版高中英语新教材选修第一册教学内容：Unit5 Revealing Nature第二课时：Understanding ideas: A journey of Discovery执教人：张诗涵/深圳市罗湖区翠园中学 Aug 11,2021Understanding ideasA journey of DiscoveryWho is he?Do you know his famous work?What is it about?Activate your background knowledge!Charles Darwin and

2、 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 environm

3、ents 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.”Charles Darwin 1.Do you know the species in the picture?Look at the evolutionary tree and answer the questions

4、.Paramecium, earthworm, snail, crab, fish, tortoise, bird, horse, human, frog, alga, moss, fern, plantUse your biological knowledge!2 What factors can cause the process of evolution?The ever-changing environment of nature; environmental changes; population immigration; genetic mutation; cultural pre

5、ferences.Use your biological knowledge!How did Darwin come up with the theory of evolution? Share your information with us?Read the passage (4 min) and talk about your understanding of the title. Most commonly, people believe that a journey means a trip from one place to another, especially over a l

6、ong distance and literarily a journey refers to the process by which something gradually changes and develops. The title may indicate that Darwins research work leading to his discovery of evolution and the origin of species .choose the main idea of the passage and give your reasons1. Darwins intere

7、st in various living things made him a great naturalist.2. Darwins 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.number the puzzle pieces in order. Organize information from the passage and complete them. th

8、e beginnng of his journeyDarwin is a young man who _Darwins adventure on The Beagle has led to _ A young man who had left medical school without completing his degree. Whats more, his father predicted in his letter that he would be “a disgrace to yourself and all your family.”Despite all this, his a

9、dventures on this ship would lead to one of the most important scientific discoveries of all time.Beagle 1. The beginning of the journeyCharles Darwin was a geologist and naturalist, fascinated by rocks, plants and animals. Darwin studied: various living things in their natural environments and samp

10、les of the plants and animals he had collected.He noticed :that some species of animals were very similar to each other.2. On his journey BACKGROUND: At that time, people believed that all species had appeared on Earth at the same time, and had not changed since. However, as he studied these, Darwin

11、 asked himself the questions:3. Generate ideasHow did different species come to exist? Maybe animals evolved as they adapted to their changing environments？the theory of evolution:living things, including human _4. Propose a theoryevolved from earlier ancestorsOn the Galapagos Islands :He noticed th

12、at there was a difference between the finches on each of the islands.5. Look for more evidenceIt seemed the beaks had evolved according to what food was available on that particular island.Rare birds on the islands Darwin suspected that the finches had evolved from a common ancestor, which had arriv

13、ed on the islands a long time before and it had slowly evolved into many new species.6. Develop ideasThe theory of Evolution: living things , including humans had evolved from lower forms of life.7. Propose a theoryToday , On the Origin of Species is regarded as one of the most important works ever

14、written. It has changed ideas about life on Earth forever. And it all began with the journey on the Beagle. Darwin was a determined man. He had strong curiosity and interests in science and was good at thinking and making discoveries.1 Why were many people “shocked”by Darwins theory?2 What kind of p

15、erson was Darwin according to the passage? At that time, many people believed that all species had appeared on Earth at the same time and had not changed since, but Darwins theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many pe

16、ople.Think and Share Charles Darwin was a geologist and naturalist, fascinated by rocks, plants and animals. He left England on the ship, the Beagle, in 1831. The journey gave him the chance 1_(study) various living things in their natural environments. He noticed that some species of animals were v

17、ery similar 2_ each other. At that time, people believed that all species had appeared on Earth at the same time, and 3_(change) since. But Darwin began to think differently. When the ship reached the Galapagos Islands in 1835, it 4_(be) the birds that interested him the most. He suspected that the

18、different 5_(finch) had evolved from a common ancestor, 6_ had arrived on the islands a long time before.直击高考 to study to had not changed wasfinches which It was a 7_(complete) new idea-a theory of evolution. Darwin explained this theory in his book, On the Origin of Species. Many people refused to believe that living things, 8_(include) humans, had evolved from lower forms of life. But Darwins scientific studies were so convincing 9_ more and more people started to believe his theory. Today , the book is r