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1、 Unit 4 Astronomy:the science of the starsWarming up&ReadingTask 1:Warming up Step 1:Guessing Can you guess what kind of Phenomenon it is or who is he?The total solar eclipse日全食日全食 on July 22 2009in our city a Chinese manan astronautShenzhou Oct.15,2003Yang LiweiA picture taken by Yang Liwei Seeing
2、the earth from spaceThe Solar system Warming up Step2:Doing Do you know how many planets circle around the sun in our solar system?What are they?Can you match the names with the planets?海王星海王星Neptune 水星水星Mercury 金星金星Venus 地球地球Earth 火星火星Mars 木星木星Jupiter 土星土星Saturn 天王星天王星UranusOn which planet are ther
3、e lives at present?the EarthHow Life Began on the Earth？How did the earth begin?Each religion and culture has its own ideas about the beginning of the earth and life.Task 2:Pre-readingWhat do you know?Pangu separated the sky from the earth 盘古开天Nuwa mended the heaven and created human beings from the
4、 clay(粘土粘土).GodReligious Beliefs According to the Bible,God created the world in seven days.How about from scientific points?Reading:How life began on the earth Task 3:while readingStep 1.Skimming and ScanningRead the text quickly and try to get key words and match the main idea of each Para.Para.1
5、a.The formation(形成形成)of the earth.Para.2 b.The importance of water for life.Para.3 c.A widely accepted theory about the formation of the universe.Para.4 d.The arrival of humans and their impact on the earth.Para.5 e.The development of plants and animals on the earth.1.Read paragraph 1 quickly and an
6、swer the question:Step2.Careful readingWhat did the universe begin with?2.Read paragraph 23.Lets get to know how life began on the earth.Careful readingAfter 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 ear
7、th at that time?what did the explosion produce?A cloud of dustsettle into a solid globeExplodewith fire&rock(produce C,N2,H2O,and other gases)madeatmospherewater appeared Cool downLife began on the earthWhat did the water do on the earth?dissolve harmful gases into 3.Read paragraph 4 and 5 quickly,a
8、nd find out the order of development of life on the earth.what kind of life form appeared first?small plants on the watershellfish&other fishGreen plants began to grow on landinsects and amphibianscan live on land and in the waterthe plants grew into forestsreptileslay eggsthe age of dinosaursmammal
9、sgive birth to young baby animalsSmall clever animalsStep 3:After readingLets review the development of life on the earth.Big BangA solid globeAtmosphere The earthThe Big BangwaterSmall plantsinsects and amphibians Reptiles on landmammals humansdinosaursWhat is the present situation of the earth?Task4:DiscussingWhat can we do to save the earth?Lets take part in the activities to save the earth!We have only one earth!We should take care of the earth!Homework 1.Exercise 1,2,3 on page 282.Read the passage for at least 3 times.Thank you!