(课件网) Unit 5 Revealing nature Section A Starting out & Understanding ideas 课前预习 知识体系图解 一、重点词汇 1._____ n.种子，籽 2._____ adj.遥远的 3._____ n.样本 4. _____v.猜想，怀疑，觉得 seed distant sample suspect 5._____ n.(动物的)原种，祖先 6.generate v._____ 7.disgrace n._____ 8.geologist n._____ 9.evolution n._____ ancestor 产生，创造 丢脸，耻辱 地质学家 进化(论) 二、重点短语 1. 追溯到 _____ 2. 与……相似 _____ 3. 适应 _____ 4. 各种各样的 _____ 5. 随着时间的推移 _____ date back to be similar to adapt to a variety of over time 6. of all time _____ 7. in question _____ 8. be crowded with _____ 9. come to exist _____ 10. be regarded as _____ 有史以来 被提及的；讨论中的；相关的 充满，满是 开始存在 被认为是 三、重点句式 1. ...but it was the birds that interested him the most. 2. How do you think the human species will evolve in the future 词汇拓展 1. distant→(n.)_____ 2. generate→(n.)_____ distance generation 阅读导学 根据课文内容，回答下列问题。 1. Why was Charles Darwin a disgrace to himself and all his family ( ) A. Because he learned medical in the school. B. Because he decided to visit distant countries. C. Because he went for adventures after school. D. Because he left medical school with no degree. D 2. What′s Darwin′s favourite subject ( ) A. Long distance journey. B. Living things. C. Medical degree. D. Natural environment. D 3. What did Darwin discover first ( ) A. All species appeared at the same time. B. All species had never changed. C. Some species were very similar. D. The evidence for changing environments. A 4. Many factors affect the evolution except _____. A. tools B. ancestor C. environment D. food 5. How did the people then react to Darwin′s discovery first ( ) A. Respected. B. Refused. C. Accepted. D. Believed. A B 课文呈现 1 Look at the page from a science magazine and answer the questions. 1 What do you know about these animals What makes them special 2 What other similar animals do you know about Share your knowledge with the class. Starting out 2 Watch the video and answer the questions. 1 How can seeds travel How can this benefit plants 2 Can you think of another example of seeds travelling Share it with the class. UNUSUAL ANIMALS TODAY Komodo dragon: Komodo dragons were first encountered by Western researchers in 1910. The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward，reaching the Indonesian island of Flores 900,000 years ago. Duck-billed platypus： The first scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platypus dates back to about100.000 years ago. Nautilus： Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. It is often considered a “living fossil”. Understanding ideas ▼ Look at the evolutionary tree and answer the questions. 1 1 Wh ... ...
