外研版 (2019)选择性必修 第一册Unit 5 Revealing nature教课ppt课件

这是一份外研版 (2019)选择性必修 第一册Unit 5 Revealing nature教课ppt课件，共25页。PPT课件主要包含了Part 1，Reading，Part 2，Journey，Homework，Part 3等内容，欢迎下载使用。
Starting ut
Lk at the page frm a sciencemagazine and answer the questins.
1. What d yu knw abut these animals?What makes them special?2. What ther similar animals d yu knw abut? Share yur knwledge with the class.
Kmd dragns:Kmd dragns were first encuntered by Western researchers 1910. The researcher said the ancestr f the Kmd dragn mst likely evlved in Australia ans spread westward, reaching the Indnesia island f Flres 900,000 years ag. 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。
Duck-billed platypusThe fist scientists t examine a preserved platypus bdy judged it a fake in the late 18th century. The ldest discvered fssil f the mdern platypus dates back t abut 100,000 years ag.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
NautilusFssil recrds indicate that the nautilus has survived relatively unchanged fr arund 500 millin years. It is ften cnsidered a “living fssil”.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”。
1. Hw can seeds travel? Hw can this benefit plants?Seeds usually are carried by the wind, water, and animals.Plants can have a better chance at life.2. Can yu think f anther example f seeds travelling? Share it with the class.
• Dandelin seeds have little parachutes t catch the wind and g further;• Humans can spread seeds if seeds get stuck t their clthing r shes.
Watch the vide and answer the questins.
Lk at the evlutinary tree and answer the questins.
1. What species d yu recgnise in the picture?Paramecium, earthwrm, snail, crab, fish, trtise, bird, hrse, human, frg...; alga, mss, fern, What factrs can cause the prcess f evlutin?
The ever-changing envirnment f nature; envirnmental changes; ppulatin immigratin; genetic mutatin; cultural preferences...
Read the passage and talk abut yurunderstanding f the title.
Mst cmmnly, peple believe that a jurney means a trip frm ne place t anther, especially ver a lng distance and literarily a jurney refers t the prcess by which smething gradually changes and develps. The title may indicate that Darwin’s research wrk leading t his discvery f evlutin and the rigin f species tk quite a lng time and great effrts, determinatin and curage t achieve.
The British bilgist, naturalist and the funder f Thery f Evlutin.In his early years, he sailed arund the wrld n the Beagle fr five years, and bserved and cllected a lt f animals, plants and gelgical structures. He published the Origin f Species and put frward the thery f bilgical evlutin, thus destrying all kinds f idealistic creatinism and species invariance. In additin t bilgy, his thery has great influence n the develpment f anthrplgy, psychlgy and philsphy. Engels listed "Thery f Evlutin" as ne f the three majr discveries f natural science in the 19th century (the ther tw are cell thery and the law f cnservatin and transfrmatin f energy), which has made utstanding cntributins t mankind.英国的生物学家，自然学家和进化论的奠基人。早年乘坐贝格尔号舰作了历时5年的环球航行，对动植物和地质结构等进行了大量的观察和采集。出版《物种起源》，提出了生物进化论学说，从而摧毁了各种唯心的神造论以及物种不变论。除了生物学外，他的理论对人类学、心理学、哲学的发展都有不容忽视的影响。恩格斯将“进化论”列为19世纪自然科学的三大发现之一（其他两个是细胞学说、能量守恒转化定律），对人类有杰出的贡献。
Chse the main idea f the passage and give yur reasns.
1. Darwin’s interest in varius living things made him a great naturalist.2. Darwin’s jurney n the Beagle inspired his Thery f Evlutin.3. Darwin went n a jurney t cnfirm his thery that humans had evlved ver time.
The title f the passage is “a jurney f discvery”. S the passage is mainly abut hw Darwin’s Thery f Evlutin generated and develped n his jurney n the Beagle.
Number the puzzle pieces in rder. Organise infrmatin frm the passage and cmplete them.
1. On his jurney n the Bealge: varius living things in their natural envirnments and samples f the plants and animals he had cllected. very similar t each ther.
2. Generate ideas• cme t exist?• Maybe animals evlved as they adapted t their changing envirnments？
3. Lk fr mre evidencethat there was a difference between the finches n each f the islands. had evlved accrding t what fd was available n that particular island.
4. Develp ideas had evlved frm a cmmn ancestr, which had arrived n the islands a lng time befre slwly evlved int many new species.5. Prpse a thery• had evlved frm lwer frms f life.
Nw discuss why Darwin did nt publish his Thery f Evlutin until 1859, abut twenty years after his discvery？ D further research if necessary.
At that time, many peple believed that all species had appeared n Earth at the same time and had nt changed since, but Darwin’s thery prpsed that living things, including humans, had evlved frm lwer frms f life, which, as a result, shcked many peple.2. Darwin was a determined man. He had strng curisity and interests in science and was gd at thinking and making discveries.