1、Unit 5Revealing nature-Understanding ideas1.Students could learn some words and phrases.2.Students could get the main idea of this passage.3.Students could write some sentences about this topic.Learning Aims:What is your understanding of the title of this unit？Share you ideas with others揭示自然的秘密 Reve
2、aling nature1.animals2.plant3.1 The captain of the ship,the Beagle,wanted someone who would“profit by the opportunity of visiting distant countries yet little known”.The person who answered the call was not the captains first choice.It was a young man who had left medical school without completing h
3、is degree.Whats more,he had recently received a letter from his father predicting that he would be“a disgrace to yourself and all your family”.Despite all this,his adventures on this ship would lead to one of the most important scientific discoveries of all time.To introduce a topic.Take notes quick
4、ly.重点词汇profit by 获益于first choice 首选;第一选择lead to 导致;通向one of 之一most important 重要的;有重大影响的;important的最高级of all time 有史以来；2 The young man in question,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 t
5、he chance to study various living things in their natural environments.After Darwin had spent some time in South America,his room on the ship was crowded with samples of the plants and animals he had collected.As he studied these,he asked himself the question:how did different species come to exist?
6、Charles Darwin.collecting samples.Take notes quickly.重点词汇Charles Darwin 查尔斯达尔文;naturalist 博物学家;同“naturalistic”chance to 有机会;偶然发生;正巧some time 早晚;一段时间South America 南美洲different species 不同的物种;异类come to 苏醒，恢复知觉;总计为，3 At that time,people believed that all species had appeared on Earth at the same time,an
7、d had not changed since.But Darwin began to think differently.He noticed that some species of animals were very similar to each other.Maybe animals evolved as they adapted to their changing environments?It was just an idea,but enough to inspire Darwin to look for more evidence.To look for more evide
8、nce.Take notes quickly.重点词汇At that time 在那时at the same time 同时;然而，不过Darwin 达尔文similar to 类似each other 彼此，互相evolved 逐渐形成，inspire 激励;鼓舞;look for 寻找;探索;4 When the Beagle reached the Galpagos Islands in 1835,Darwin saw a variety of new species,but it was the birds that interested him the most.Darwin not
9、iced that there was a difference between the finches on each of the islands.It seemed their beaks had evolved according to what food was available on that particular island.Take notes quickly.重点词汇Beagle 小猎犬;Gal 女孩;姑娘;女子Darwin 达尔文a variety of 各种各样的;种种;形形色色noticed 看到;beaks 鸟喙 evolved 逐渐形成according to
10、根据;5 Darwin suspected that the finches had evolved from a common ancestor,which had arrived on the islands a long time before.Over time,it had slowly evolved into many new species.And that was the answer to how new species of plants and animals came to exist:they evolved from earlier ancestors怀疑.Tak
11、e notes quickly.重点词汇Darwin 达尔文suspected 疑有，evolved 逐渐形成common ancestor 共同祖先Over time 随着时间的推移new species 新种;新物种;answer to 回答；ancestors 祖宗;祖先 6 It was a completely new idea a theory of evolution.Darwin explained this theory in his book,On the Origin of Species.It was not published until 1859 and immed
12、iately caused a storm.Many people refused to believe that living things,including humans,had evolved from lower forms of life.They were shocked.But Darwins scientific studies were so convincing that more and more people started to believe his theory.a theory of evolution.Take notes quickly.重点词汇compl
13、etely new 全新的theory of 的理论;理论探讨Darwin 达尔文Origin of Species 物种起源;物种的起源living things 生物scientific studies 科学研究convincing 令人信服的;有说服力的;7 Today,On the Origin of Species is regarded as one of the most important works ever written.It has changed ideas about life on Earth forever.And it all began with the j
14、ourney on the Beagle.It has changed ideas about life on Earth forever.Take notes quickly.重点词汇Origin of Species 物种起源;物种的起源regarded 将认为;把视为;看待;注视，凝视;one of 之一written 书面的;笔头的;on Earth 在地球上;地球上forever 永远;长久地;journey 旅行;行程Before the journeyDuring the journeyAfterthe journeyA Journey of DiscoveryPara.1 Pa
15、ra.2 Para.3 Para.4 Para.5 Para.6 Para.7 Introduction of this passage On his journey Think of ideas More evidencesNew ideas A new theoryConclusion of this passage1 Darwins interest in various living things made him a great naturalist.2 Darwins journey on the Beagle inspired his Theory of Evolution.3
16、Darwin went on a journey to confirm his theory that humans had evolved over time.What have you learnt about the spirit of scientific exploration?virtuesDeterminedstrong will self-confidencefreed time imaginationcreativityinspirationoptimisticnot give upTry to think about othersQuestionTalk with others.1.2.3.Thank you!
