内蒙古托克托县第一中学高中英语 Unit 4 Astronomy the science of the stars 学案(1).doc

内蒙古托克托县第一中学高中英语 unit 4 astronomy the science of the stars 学案（无答案）1.develop students reading ability and let them learn different reading skills;2.get the students to learn the useful new wordsand expressions in this part;3.enable students to know about the development of the earth.一、translation1. to begin with 2. in time 3. in ones turn 4. preventfrom 5. block out 6. break out 7. watch out 8.产生，分娩 9.由于，因为 10.令人迷惑的 11.感到迷惑的 12.在场的 二、questions:1. do you know the solar system in the universe? what is it made of?_2. can you name the 8 planets?_3. which planet do we live on? can you describe what it looks like?_4. is there any life on other planets?_5. do you know some religions about how life began on the earth?_step 1. first reading1. read the text, try to tell us the main idea or translate the following words into english. 短文解释了生命如何在地球上开始的。首先，地球爆炸和产生水。因为水的存在，然后植物和动物，包括人类逐渐在地球上出现。_2. match each paragraph with its main idea para.1 a .the importance of water for life para.2 b. the development of plants and animals on the earth para.3 c. the formation of the earth para.4 d. a widely accepted theory about the formation of the universe para.5 e. the arrival of humans and their impact on the earthstep 2. second readingput the order of development of life into a timeline1. insects and amphibians appeared2. dinosaurs appeared3. the earth became a solid ball4. small plants grew on the water5. reptiles appeared6. plants began to grow on dry land7. the earth was a cloud of dust8. water appeared on the earth 9. shellfish and other fish appeared10.the universe began with a “big bang”11.clever animals with hands and feet appeared12.mammals appeared.正确顺序：_step 3 .third readingread the 2nd and 3rd paragraphs, and answer:1.what did the earth look like after the “big bang”?_2.what was life able to develop on the earth but not other planets?_3.why were mammals different from other animals?_step 4 .discussion1.do you think life will continue on the earth for millions of years to come? why?2.why do we human beings try to explore space again and again?finish the following text, pay attention to the spelling and usage of words. as the result of big bang, the violent earth slowly settled into a globe 1 (move) around the sun. the gasses which were to make the earths 2 （大气层）came into being from the explosion of the dust ball, with water 3 (follow) them while the earth cooled down. it allowed the beginning for life. many millions of years 4 , the first 5 (极度的) small plants began to appear 6 the surface of the water, 7 (繁殖) and filling the sea and oceans, which encouraged the later development of early shellfish and all sorts of fish. as time passed, green plants taking carbon dioxide and producing 8 （氧气）came to land and grew into forest. later the chains of lives continued, such as insects, amphibians, reptiles, dinosaurs and mammals, the typical of 9 is human being. they dont only do 10 to the earth but cause damage to it.一、try to imitate the sentences from the text to write new sentences1【原句】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. 模仿要点 句子结构： what主语从句is till +时间名词定语从句【模仿1】他要给我什么礼物一直不知，直到昨天下午他来看我是我才知道。_【模仿2】没人知道我们将要得到什么样的工作，直到3年后我们从大学毕业以后才知道。_ 2【原句】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. 模仿要点 句子结构: 主语从句 is that表语从句【模仿1】他想告诉我们的是一天下午当他在回家的路上看见一只小鸟受伤了。_【模仿2】他缺席的原因是他在上学时被一辆小车撞伤了。_3【原句】they multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. 模仿要点 句子结构：which 引导一个定语从句对上句情况的进一步说明。【模仿1】我们常常看到有人乱丢乱吐，这弄得我们的环境很脏_【模仿2】她的父母非常感激我们，医生也高度评价了我们的急救，这使得我们意识到学习急救的必要性。_课后练习一、fill in each blank with a suitable phrase from the box in the correct formhang out give out break out watch out sell out block out1) please move that curtain as it is _the light.2) i was with my friend when a fight _between the fans of the two football teams.3) i _the tickets for the concert to my friends because my brother was playing in it.4) i waited in line to buy a copy of the new book but they had _when it was my turn.5) “if you dont _, you will hurt yourself,” said my mother.6) she took the wet clothes to _ on the washing line.二、complete the sentences with the words in brackets1) buddhism is one of the world _ and one of its most famous _ buildings in china is the potala palace in tibet.(religions; religious)2) this girl looked very much _ her mother. however, _the girls of her age, she dreamed of becoming a physicist.(like; unlike)