Unit4Astronomy-Warming-up

1、Unit 4a Chinese.a Chinese.an astronautan astronautShenzhouShenzhou Oct. 16, 2003Oct. 16, 2003malemaleYang LiweiA picture taken by Yang Liwei solar system太阳系太阳系 eight planets many comets other objects 海王星海王星 NeptuneNeptune水星水星Mercury Mercury 金星金星Venus Venus 地球地球Earth Earth 火星火星Mars Mars 木星木星Jupiter J

2、upiter 土星土星SaturnSaturn天王星天王星Uranus Uranus Scientists now think Pluto is too small to be called a planet.On which planet are there On which planet are there lives at present ?lives at present ?EarthDo you know how our life began on the earth?Do you know any ancient idea about the beginning of the un

3、iverse?Pangu separates the sky from the earth. 中国神话传说中有盘古开天地的说法。中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌巨人盘古用一把利斧劈开混沌, 将天地将天地分开。死后分开。死后, 他的气息化成风和云他的气息化成风和云, 声音声音变成轰轰的雷声变成轰轰的雷声, 左眼化为太阳左眼化为太阳, 右眼化右眼化为月亮为月亮, 手足与四肢变成大地的四极与手足与四肢变成大地的四极与五方的名山五方的名山, 血液化成江河血液化成江河,筋脉铺成道筋脉铺成道路路, 肌肉形成田地肌肉形成田地, 须发成为星星须发成为星星, 牙齿牙齿和骨骼化为金属、

4、珍珠、玉石和骨骼化为金属、珍珠、玉石, 汗水成汗水成为滋润万物生长的甘霖和雨露。为滋润万物生长的甘霖和雨露。Nvwa made humans.Other legends about the beginning of universe.The Biblical AccountDay 1: God spoke and separated light from darkness creating Day and Night. Day 2: God spoke and separated the water creating sky and ocean. Day 3: God spoke and cr

5、eated dry land. Day 4: God spoke and created the sun, moon and stars. Day 5: God spoke and created living creatures in the air and sea. Day 6: God spoke and created the land animals and man. Day 7: God rested and blessed this day calling it Holy. Do you believe in such stories? Are they based on sci

6、ence?Whats the title of the text?the origin of life on the earthWhich question are you interested in in this text?1) How old is the earth?2) How does the universe begin?3) Is there any water in the Mars?4) When did dinosaurs disappear?5) Which animal is the most important one on the earth?Do you kno

7、w which paragraph you can find out the answer?海洋里的细胞开始分裂海洋里的细胞开始分裂 登陆登陆爬行动物爬行动物恐龙恐龙Mammals人类的兴起人类的兴起 Do you know what it was like before life appeared on earth?可以演化成低级生命的小液滴水泡状的太空原始生命体It was full of water.1. What do we mean when we say we are studying a subject scientifically? Or whats the correct a

8、ttitude towards science? We should be objective, not superstitious.2. Whats the correct way to prove a scientific idea? We should design experiments to test it for several times. Then we can analyze the results and draw a conclusion at last.3. What are the most important skills we need to be real sc

9、ientists? Careful, objective and logical, draw conclusions from the experiments and not impose conclusions on the data. (imposeon 把把强加于强加于)1. The origin of life on earth is a question that interests astronomers. What do you know about it? How old is the universe? (several billion years ago) How old

10、is the Earth? (between 4.5 and 3.8 million years ago) Which were the first creatures or plants on Earth?.Pre-reading2. Each religion and culture has its own ideas about how life began on earth. What do you know? In China, we all know that Pangu separates the sky from the earth and Nvwa made humans.1

11、. According to a widely accepted theory , the universe began with a _that threw matter in all directions.2. It was not immediately obvious that _was to be fundamental to the development of _.3. They are putting too much CO2 into the atmosphere, which prevent _ from escaping from the earth.Task one:

12、Fill in the blanks after listening1. According to a widely accepted theory, the universe began with a _that threw matter in all directions.2. It was not immediately obvious that _was to be fundamental to the development of _.3. They are putting too much CO2 into the atmosphere, which prevent _ from

13、escaping from the earth.Task one: Fill in the blanks after listeningwater life“Big Bang”heatWhats the writing style of the text?A. Narrative 记叙文B. Explanation 说明文C. Essay 散文11111111111111111111111111111111111111111111111111111111Lets get to know how life began on the earthTask two: Read paragraph 1-

14、3 quickly by yourselves.After the “Big Bang”,what happened on the earth ?for several billion years after “Big Bang”between4.5 and 3.8 billion years agoWhat happened on the earth at that time?what did the explosion produce?A cloud of dustA cloud of dustsettle into a settle into a solidsolid globe glo

15、beExplodeExplodewith fire & rockwith fire & rock(produce C, N(produce C, N2 2, H, H2 2O, and other gases)O, and other gases) madeatmosphereatmospherewater appearedwater appeared Cool downCool downLife began on the earthLife began on the earthWhat did the water do on the earth?dissolve harmful gases

16、into dissolve harmful gases into Read paragraph 4 and 5 quickly, and find out the order of development of life on the earthwhat kind of life form appeared first?small plants on the watersmall plants on the watershellfish & other fishshellfish & other fishGreen plants began to grow on landinsects and

17、 amphibiansinsects and amphibianscan live on land and in the watercan live on land and in the waterthe plants grew into foreststhe plants grew into forestsreptilesreptileslay eggslay eggsthe age of dinosaursthe age of dinosaursmammalsgive birth to young baby animalsclever animalsclever animalsWhat p

18、roblem are these clever animals What problem are these clever animals causing?causing?They are putting too much COThey are putting too much CO2 2 into the atmosphereinto the atmosphereThe text can be divided intoPart one: The development of earth itself.Part two: The development of life. Life in the

19、 water Life on the landOrder of writing: Summarytwo partsChronological (time)1.1. Why did the plants grow before the Why did the plants grow before the animals came? animals came?2. Why is it wrong to show films with 2. Why is it wrong to show films with dinosaurs and people together? dinosaurs and

20、people together?Pair-workDo you have more questions after reading the text? Discuss them with your partner.1.1. Why did the plants grow before the Why did the plants grow before the animals came? animals came?2. Why is it wrong to show films with 2. Why is it wrong to show films with dinosaurs and p

21、eople together? dinosaurs and people together?Pair-workBecause plants provide oxygen and food for animals.Because dinosaurs died out long before human being developed on the earth.What will happen when we put too What will happen when we put too much CO2 into the atmosphere?much CO2 into the atmosph

22、ere? greenhouse effect greenhouse effectglobal warmingglobal warminganimals will die outanimals will die outplants will die outplants will die outThere will be no life on the earthThere will be no life on the earthDiscussionrise of the sea levelrise of the sea levelicebergs and glaciers melticebergs

23、 and glaciers meltA United Nations Climate Change Conference will be held next month. Our class is going to write a letter to the conference. What would you like to say in the letter? Do you have any good ideas about how to prevent Global Warming?Please form a group and discuss. One Earth, One HomeHeal the worldMake it a better placeFor you and for me and the entire human racePhrases and Useful Expressions1. circle around 绕绕转转2. a