必修三-Unit-4-Astronomy-warming-up-and-reading

1、Unit 4 Astronomy: Unit 4 Astronomy: the science of the starsthe science of the starsPeriod Warming up and Reading学习目标（学习目标（Learning aims）:1.语言知识目标（语言知识目标（language aims）：）：(1)了解地球上生命的起源和进化过程；了解地球上生命的起源和进化过程；(2) 学习并掌握本课的词汇和主语从句的用法。学习并掌握本课的词汇和主语从句的用法。2.能力目标（能力目标（ability aims）：）： 训练英语阅读技巧并提高阅读能力。训练英语阅读技

2、巧并提高阅读能力。3.情感目标（情感目标（emotion aims）：）：（1）激发学生对天文知识的兴趣，培养其科学）激发学生对天文知识的兴趣，培养其科学 探索精神；探索精神；（2）认识保护）认识保护地球地球的重要性。的重要性。A Quiz Game Think about and discuss these questions in groups. In our solar system eight planets circle around the sun. What are they? Can you match the names with the plants according t

3、o the picture?Warming upThe Solar SystemThe Solar System1111THE SOLAR SYSTEM Can you name each planet correctlyEarthJupiterMarsMercuryNeptuneSaturnUranusVenusA.地球地球 _B. 木星木星 _C.火星火星 _D.水星水星 _E.海王星海王星 _G. 土星土星 _H. 天王星天王星 _I. 金星金星 _Mercury Venus Earth Mars Jupiter Uranus Saturn NeptunePut them in corr

4、ect orderOn which planet are there On which planet are there lives at present ?lives at present ?Earth1.Do you know how life began on the earth? What legend（传说（传说 ）and religion stories did you hear about?2.Whats the scientific theory about this topic?Discussion：Discuss the questions in pairsPre-read

5、ingPan Gu separated the sky from the earth, Nv Wa made humans from the clay(土土)and the God created the world in the Bible.The universe began with a “Big Bang”.Ancient Chinese had their own ideas Ancient Chinese had their own ideas about how life began on the earth.about how life began on the earth.D

6、o you know these stories? Give an Do you know these stories? Give an example, please.example, please.How life began on the earth?How life began on the earth?Pan Gu separated the sky 盘古开天 NvWa created human女娲造人 The beginning of the lifeBig BangGod created the world 上帝创世论上帝创世论HOW LIFE BEGAN ON THE EAR

7、THReading1.Listening and Skimming to get the general idea of the text Task 1 Choose the best answer to each question according to the text.1. Why was life able to develop on the earth but not on other planets？ A. The water on the earth B. The earths atmosphere C. The form of forests D. It was the ol

8、dest planetA2. Which of the following appeared on the earth first? A. Insects. B. Reptiles. C. Amphibians. D. small plants appears in waterD 3.Why did dinosaurs disappear 65 million years ago?_ A. Because the earth was too hot for them to live on.B. Because there was no food for them to eat.C. Becau

9、se the earth exploded at that time. D. It still remains a mystery for us.D4.What problem is caused by human beings? AThey exist everywhere on the earth.BThey cause global warming. CThey find new methods of growing crops.DThey enjoy hunting and fishing. BTask 2 Read the passage again and match the ma

10、in idea with each paragraph. Para. 1 The formation (形成形成) of the earth.Para. 2 The importance of water for life.Para. 3 A widely accepted theory about the formation of the universe.Para. 4 The arrival of humans and their impact on the earth. Para. 5 The development of plants and animals on the earth

11、.1. smallplantsin water2. 3.greenplantson land4.insects (on land)5.6. forests7. 8. 9.10. reptiles mammalshumansshell fish and allsorts of fishamphibiansThe development of lifeThe development of lifeTask 3 Complete the following chart after careful readingdinosaursTask 4： 课文内容语法填空课文内容语法填空Fill in the

12、blanks with the proper wordsMost scientists think the universe began with a “Big Bang” 1 3.8 and 4.5 billion years ago, the dust settled into 2 solid globe, 3 exploded with fire and rock and formed the earth s atmosphere.As the water appeared on the earth，the 4 (harm) gases and acids was dissolved i

13、nto the oceans and seas, which made life 5 (possible) develop on the earth. Many millions of years 6 ，the first plants appeared on the water and they produced oxygen. Thanks to the oxygen，all kinds of life 7 (appear) on the earth. Until 2.6 million years ago the human beings ancestors began to devel

14、op all over the earth one after another. But their 8 (activity) produced too much dioxide into the air， 9 (cause) global warming problem. So the earth will be 10 danger. 1.Between 2.a 3which 4.harmful 5.possibly 6.later 7.appeared 8.activities 9.causing 10.in. Because men are putting too much carbon

15、 dioxide into the atmosphere, which prevents heat from escaping from the earth into space.The earth may become too hot to live on .Thinking and speaking after classWhat should we do to protect the earth?Brief summaryToday we have gained the knowledge about astronomy and knew about the beginning of the life on the earth. But the human beings are no