高一英语Unit4 Astronomy the science of the starsreading 新课标 人教（通用）.ppt

Astronomy,Where do we come from? Or we can say: Who are our ancestors,Pre-reading,Big Bang,A solid ball,Atmosphere,The earth,It was full of water,Original cells,The cells in the water began to separate,water,Plants in the water,Shellfish and fish,Plants on land,Insects and amphibians,Reptiles,Dinosaurs,Mammals,Man had evolved from apes,Do you know each religion or culture has its own ideas about the beginning of the universe,Pangu separates the sky from the earth,Other legends about the beginning of universe,Day 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 created dry land,上帝创世说,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,India Brahma(婆罗门) is the god first represented in the Hindu Triad. He is the creator of the universe and all living beings are said to have evolved from him,What is the passage about,Reading,Its about the development of the earth,What was there on the earth before life could begin? 2. Why do scientists think there has never been life on the moon? 3. Why did animals first appear in the seas? 4. Why did green plants help life to develop? 5. Why were mammals different from other animals,Fast reading,1. What was there on the earth before life could begin? Water vapour, carbon dioxide, oxygen, nitrogen and other gases,2. Why do scientists think there has never been life on the moon? Because there is no water on the moon. 3. Why did animals first appear in the seas? Because water allowed the earth to dissolve harmful gases into the oceans and seas,4. Why did green plants help life to develop? Because green plants can take carbon dioxide from the atmosphere and fill the air with oxygen,5. Why were mammals different from other animals? They were different because they produced their young from within their bodies,Careful reading,1. How did water come into being on the earth,2. Whats the significance of the presence of water on the earth,The explosion of the earth produced water vapor, which turned into water when the earth cooled down,It allowed the earth to dissolve harmful gases into oceans and seas,1 why was the earth different from other planets?A It produced a lot of heat B The water remained C Water disappearedD It was the oldest planet 2 Why was life able to develop on the earth but not on other planets?A The earth had a solid shape B The earth did not have harmful gases in its atmosphereC The water stayed on the earth but not on other planetsD The earth was not too hot but not too cold,Choose the best answer,B,C,3 Why was it necessary for plants to grow before animals?A Animals needed plants to protect them from the sun B Plants provided oxygen for animals to breatheC Animals could hide from hunters in forests.D It was easier for plants to grow.4 What problem is caused by human being?A They exist everywhere on the earthB They cause global warming C They find new methods of growing cropsD They enjoy hunting and fishing,B,B,Read paragraph 2 to 4 carefully and finish the following form,How life began on the earth,1. small plants in water,2,3. green plants on land,4. insects(on land) 5,6. forests,7. reptiles(on land) 8. 9,10. small clever animals with hands and feet,11,shellfish and all sorts of fish,amphibians (on land and in water,dinosaurs(on land,mammals(on land,human,Discussion,1 Why is it wrong in films and stories to show dinosaurs and people together,2 Why do you think that humans are the cleverest animals on the earth,Because dinosaurs died out long before human beings developed on the earth,We are the cleverest animals because we have large brains than any other creatures on the earth so far,Group work,Is the earth getting warmer each year? If so, what effects will this have? Whats the “green house effect,” which some scientists say might destroy our planet? Will the burning of coal, oil, and natural gas cause the earth to become a dead planet like Venus,1.last 1) adj. last summer/last Monday,2) adv. When did you last get a letter from your mother,3) vi. How long will the fine weather last,4) n. These are the last of our books./ at last (the last of 最后的人或事物,Language points,2. explode (v.) explode the bomb explode with/in anger explode into/with laughter,3.in time If you keep on studying hard, youll succeed in time.(迟早,She will be back in time to prepare dinner. (及时) in time (for sth/ to do sth,The audience clapped in time to the music. (in/out of time 合/不合节拍,4.cool 1) v. Please open the window to cool the room. Dont drink the tea before it cools a little. If your both sides dont cool down first, we cant settle the heated argument better. (cool down) Try to cool her down. (cool down,2) adj. be/get/seem/keep cool His songs received a cool response from the public,5. Sb+vt+it+adj/n,for sb/sth) to do。