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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,Unit 4,Astronomy,：,the science of the stars,Unit 4Astronomy：the science o,Section ,Warming Up & Reading,Preparing,Section Warming Up & Reading,预习多维感知,Section ,预习多维感知Section ,预习多维感知,Step One,：,Ask and Discussion,1,Do you know how many planets circle around the sun in our solar system?,_,_,答案：,Venus(,金星,),；,Earth(,地球,),；,Mars(,火星,),；,Mercury(,水星,),；,Jupiter(,木星,),；,Saturn(,土星,),；,Uranus(,天王星,),；,Neptune(,海王星,),预习多维感知Step One：Ask and Discus,2,Each religion and culture has its own ideas about how life began on earth.What do you know?,_,_,_,答案：,In China,，,we all,know that Pangu separates,the sky from the earth.In western culture,，,God created the world in six days.Many scientists believe that the universe began with a huge explosion called the “Big Bang”,2Each religion and culture ha,Step Two,：,Fast Reading,Scan the text and then choose the best answer according to the text.,1,What is the correct order according to the text?,The clever animals with hands and feet appeared and spread all over the earth.,The “Big Bang.”,Small plants began to appear on the surface of the water.,Step Two：Fast Reading,65 million years ago,，,the age of the dinosaurs ended.,A,B,C,D,答案：,D,65 million years ago，the age,2,How did the atmosphere on the earth appear?,A,It came from space.,B,It came from the explosion.,C,It came from the oceans.,D,It came from the forests.,答案：,B,2How did the atmosphere on th,3,In our solar system,，,why does life only exist on the earth?,A,Because it is very warm on the earth.,B,Because it is cool enough on the earth.,C,Because there is plenty of water on the earth.,D,Because it is big enough.,答案：,C,3In our solar system，why does,4,Why did plants appear earlier than animals?,A,Because plants could produce oxygen,，,which was important for animals.,B,Because plants were more advanced than animals.,C,Because animals needed more water.,D,Because plants needed more water.,答案：,A,4Why did plants appear earlie,5,According to the passage we can know _.,A,only the earth has life on it in space,B,oxygen in the atmosphere on the earth came from the “Big Bang”,C,humans are the cleverest animals of the earth,D,plants played an important part in the appearance of animals,答案：,D,5According to the passage we,Step Three,：,Careful Reading,1,Read the text carefully and then answer the following questions.,(1)Why was the earth different from other planets?,_,答案：,Because the water remained on the earth.,Step Three：Careful Reading,(2)Why did the plants grow before the animals came?,_,答案：,Because plants provided oxygen for animals to breathe.,(3)Why is it wrong in films and stories to show dinosaurs and people together?,_,答案：,Because dinosaurs died out long before human beings developed on the earth.,(2)Why did the plants grow bef,2,Read the text and match each paragraph with its main idea.,Paragraph 1(,)A.How humans appeared and what effects they have caused to the earth.,Paragraph 2(,)B.Water is very important for life on the earth.,Paragraph 3(,)C.How the earth formed.,Paragraph 4(,)D.How the plants and animals on the earth developed.,2Read the text and match each,Paragraph 5(,)E.It is widely accepted that the universe began with a “Big Bang”,答案：,ECBDA,3,Read the text and write down the main idea of it.,The text mainly tells us the _ of the earth and the _ of life on it.,答案：,formation,；,development,Paragraph 5()E.It is widely,Step Four,：,Summary,Read the text carefully and fill in the blanks.,The earth was just a cloud of 1._after the “Big Bang”,The earth 2._loudly with fire and rock. They were in 3._to produce many things,，,which were to make the earths atmosphere. As the earth cooled down,，,water began to appear on its surface. It allowed the earth to dissolve 4._gases.Then life began to develop.,Step Four：Summary,The first small plants 5._and filled the oceans and seas with oxygen.This encouraged the 6._of early shellfish and fish.Land animals such as insects,，,reptiles and dinosaurs and so on appeared after green plants appeared.Small clever animals 7._all over the earth.They are putting too 8._carbon dioxide into the atmosphere,，,which 9._ heat from the earth into space.,The first small plants 5._,Whether life will continue on the earth for millions of years to come will 10._ on whether this problem can be solved.,答案：,1.dust 2.exploded3.time,4.harmful,5.multiplied,6.development,7.spread8.much,9.prevents,10,depend,Whether life will continue on,Step Five,：,Discussion,1,What problems have been caused by humans to the earth?,_,_,2,As a student,，,what little things can we do for the earth?,_,_,Step Five：Discussion,
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