人教版必修三Unit 4 Astronomy：the science of stars reading 学案.doc

unit 4 astronomy：the science of stars reading 学案learning target:words and expressionsastronomy, atmosphere, system, violent, solid, explode, carbon, dioxide, oxygen, surface, planet, harmful, development, spread, method, depend, solar system, in time, prevent. from, depend onsentence patterns 1. what it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.2. they were in time to produce the carbon, nitrogen, water vapour and other gases, which were to make the earths atmosphere.3. what many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.4.so whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.learning procedures:step 1:practice before class translation-practice group 1.孩子们盼望着父母亲能平安回来.group 2: 他现在不是烟民，因为去年他已戒了烟。group 3: 如此频繁地更改时间表，看来是不合逻辑的。group 4: 请原谅我未经允许就进来了。 step 2: while-study1. self-observationgroup 1. what was there on the earth before life could begin? group 2. why did animals first appear in the seas? group 3. why did green plants help life to develop? group 4. why were mammals different from other animals?2. self-experiencegroup 1&3: find out the following words in the text and explain them in your own words, then translate them into chinese:astronomy_ atmosphere_ system_ violent_ solid_ explode_ carbon_ dioxide_ oxygen_ surface_ planet_ harmful_ development_ spread_ method_group 2 &4.write down the corresponding english words:大气_ 猛烈的_ 爆炸，爆发 _氧气_ 行星_ 天文学_系统_ 固体_ 碳_ 表面_3self-digestion group 1 &3: read the text carefully, then fill in the missing words according to your understanding.the explosion of the earth p_ water v_, which turned into water when the earth c_ down. water allowed the earth to d_ harmful gases into the o_ and seas. that made it possible for life to begin to d_. the arrival of small plants en_ the development of early s_ and all sorts of fish. many millions of years later the first green p_ began to appear on land. later land animals appeared. some were i_. others, called a_, were able to live on land as well as in the sea. when the plants g_ into forests, r_ appeared for the first time. group 2 & 4read the text carefully, then choose the right words to complete the following passage:( animals disappeared group different produced bodies spread covered)later, dinosaurs developed. they became the most important _ on the earth for millions of years. after they _, mammals became more important. they were the last _ of animals and they were_ because they _ their young from within their _. small clever animals, with hands and feet, appeared and _ all over the earth. as time went by, they _ the earth and have become the most important animals on the planet.4.discussion:what events happened to the following times? 1) several billion years after the “big bang”:2) between 4.5 and 3.8 billion years ago3) many millions of years later.4) for more than 140 million years5) 65million years ago 6) about 2.6 million years ago 5. self-developmentgroup 1 & 3: put the order of development of life into a timeline, use the reading passage to help you.(1). insects and amphibians appeared(2). dinosaurs appeared (3). the earth became a solid ball.(4). small plants grew on the water .(5). reptiles appeared (6). plants began to grow on dry land.(7). the earth was a cloud of dust(8). water appeared on the earth.(9). shellfish and other fish appeared.(10). the universe began with a “big bang”(11). clever animals with hands and feet appeared.(12). mammals appeared.group 2 & 4:think about what you have read and discuss these questions in pairs.1. why was the earth different from the other planets?2. why did the lp0ants grow before the animals came?3. why is it wrong to show films with dinosaurs and people together?4. what problem is caused by human beings?step 3 post-study完形填空（阅读下面短文，掌握其大意，然后从3655各题所给的四个选项（a、b、c和d）中，选出最佳选项。carols husband was killed in a car accident last year.jim, only 52, was 1 home from work. the other driver was a teenager who had 2 a lot. jim died at once. the teenager was in the 3 for less than three hours.it was carols fiftieth birthday, and jim had two plane tickets to hawaii in his pocket. he was going to 4 her. however, he was killed by a drunken driver.“how have you 5 this?” i asked carol, a year later.6 welled up（涌出） in her eyes. i thought i had said the 7 thing, but she said, “its all right. i want to 8 you. the day i married jim, i promised i would never let him leave the house in the morning 9 telling him i loved him. he made the same 10 . it got to be a joke between us, and as we grew older it got to be a(n) 11 promise to keep.“i remember running down the driveway, saying i love you just before he drove out of my 12 , or driving all the way to his office just to put a(n) 13 saying i love you on his car. it was a funny 14 .“we made a lot of 15 trying to say i love you before noon every day of our married life.“the morning jim 16 , he left a birthday card in the kitchen and then left 17 . i heard the engine starting. oh, no, i thought. i 18 out quickly and knocked on the car window 19 he rolled it down.“here on my fiftieth birthday i, carol garret, want you, mr james e. garret to 20 that i love you!“thats how ive survived, knowing that the last words i said to jim were, i love you!” 1. a. walking b. arrivingc. drivingd. riding 2. a. drunk b. eaten c. talked d. done3. a. school b. hospitalc. office d. prison4. a. surprise b. interestc. disappointd. frighten5. a. learned b. survivedc. existed d. explained6. a. excitement b. happiness c. joys d. tears7. a. sad b. extra c. wrong d. violent8. a. tell b. depend c. cheer d. believe9. a. with b. besidesc. after d. without 10. a. idea b. choice c. promise d. mistake11. a. hard b. easy c. silly d. harmful12. a. reach b. sight c. house d.