1、Unit 4Unit 4 Astronomy:Astronomy:the science of the stars the science of the stars READINGlChineselEnglish lmathematicslphysicslhistorylgeographylphysicslbiologylchemistrybrainstormingGeophysics地球物理学地球物理学biochemistryDo you like astronomy?Do you want to be an astronomer?Do you know some famous astron
2、omers?What do you know about astronomy?Astronomy is the scientific study of the universe and the heaven bodies(such as the sun,the moon,and stars),gas,and dust within it.In our solar system there are eight planets circling around the sun.Look at the picture.What are they?Can you match the names with
3、 the planets?Uranus 天王星天王星 Venus 金星金星 Earth Mars 火星火星 Mercury 水星水星 Jupiter 木星木星 Neptune 海星海星 Saturn 土星土星Mercury Venus EarthMarsJupiterSaturnUranusNeptuneLets appreciate Lets appreciate some beautiful pictures some beautiful pictures of the solar system.of the solar system.Total lunar eclipse(月全食）月全食
4、）Total solar eclipse(日全食日全食)Meteor rain（流星雨）（流星雨）Comet(彗星彗星)What interests you in astronomy?Do you know any questions that astronomers are interested in?How did life begin on Earth?How did life begin on Earth?How was the universe formed?How was the universe formed?Is there life on the planets?Each r
5、eligion and culture has its own ideas about how life began on earth.What do you know?Are they true for the beginning of the life?Pangu separatedthe sky盘古开天盘古开天Nvwa created humans女娲造人女娲造人God createdthe world 上帝创世论上帝创世论Pangu separates the sky from the earth.Legend:The Goddess Nuwa mended the heaven an
6、d created human beings from the clay(粘土粘土).According to Bible(圣经圣经),God created the world and the first man,Adam(亚当亚当)and the first woman,Eve(夏娃夏娃).God created the world in seven days.Religious Beliefs Day 1:God spoke and separated light from darkness,creating Day and Night.Day 2:God spoke and separ
7、ated the water creating sky and ocean.Day 3:God spoke and created dry land.Day 4:God spoke and created the sun,the moon and stars.Day 5:God spoke and created living things in the air and sea.Day 6:God spoke and created the land animals and the first man.Day 7:God rested and called this day Holy.A Qu
8、iz Game 1.How old is the earth?A.About 3.5 billion years B.About 4.5 billion years C.About 5.5 billion years D.About 6.5 billion years 2._ of the earth surface is covered by water.A.20%B.30%C.50%D.70%3.How many planets are there in the Solar System?A.6 B.7 C.8 D.9 4.What is the total population of h
9、umans on the earth?A.About 3.5 billion B.About 4.5 billion C.About 5.5 billion D.About 6.5 billion5.How long does the rotation(自转自转)of the earth take?A.12 hours B.24 hours C.a month D.365 days6.Which continent is the smallest?A.Africa B.North America C.South America D.Oceania 7.On what day is the Ea
10、rth day celebrated?A.April 22 B.May 4 C.August 21 D.November 118.Which ocean is the largest?A.The Pacific Ocean B.The Arctic Ocean C.The Indian Ocean D.The Atlantic Ocean9.Which country has the largest area?A.Canada B.China C.Russia D.U.S.AHow Life Began on the EarthHowLIFE BEGAN ON THE EARTH?Read t
11、he title and look at the pictures.Predict what the reading will be about?Scientific Theories Famous scientists such as Newton,Einstein and Stephen Hawking had their own theory about the origin of the universe.The universe began from the Big Bang.Life first began in the sea on the earth.Life was brou
12、ght to the earth by ET from outer space.Life came from a comet which hit the earth.Fast reading 1.Match the main idea of each paragraph Para.1 The formation(形成形成)of the earth.Para.2 The importance of water for life.Para.3 A widely accepted theory about the formation of the universe.Para.4 The arriva
13、l of humans and their impact on the earth.Para.5 The development of plants and animals on the earth.2.The main idea of the text.The text mainly tells us the _ of the earth and the _of life on it.formationdevelopment Read the passage again and put the order of development of life into a timeline acco
14、rding to the reading passage.（Exercise 2 on Page 27）1.Insects and amphibians appeared.3.The earth became a solid ball.5.Reptiles appeared.7.The earth was a cloud of dust9.Shellfish and other fish appeared.11.Clever animals with hands and feet appeared2.Dinosaurs appeared.4.Small plants grew on the w
15、ater.6.Plants began to grow on dry land.8.Water appeared on the earth10.The universe began with a“Big Band”.12.Mammals appeared.831091151741262Can you put the order of development of life into a time line?Ex.2 on P27 Read the passage as listening to the tape,and then answer the following questions.Q
16、uestions:1.How did the universe begin according to a widely accepted theory?2.What was produced when the earth exploded?3.Why is water important on the earth?4.Why did green plants help life to develop?5.Why were mammals different from other life forms?6.Whats the problem with the earth now?1.How di
17、d the universe begin according to a widely accepted theory?（Para.1）The universe began with a Big Bang.2.What was produced when the earth exploded?（Para.2）Carbon,nitrogen,water vapour and other gases.3.Why is water important on the earth?（Para.3）It allowed the earth to dissolve harmful gases and acid
18、s into the oceans and seas.4.Why did green plants help life to develop?（Para.4）Because green plants can take carbon dioxide from the atmosphere and fill the air with oxygen.5.Why were mammals different from other life forms?（Para.4）Because they gave birth to young baby animals and produced milk to f
19、eed them.6.Whats the problem with the earth now?（Para.5）The earth may become too hot to live on.Detailed reading This text can mainly divided into two partspart 1:The development of the earthpart 2:The development of life(para 13)(para 45)part 1:The development of the earth(1)After the Big Bang,what
20、 was the earth like?a cloud of dust a solid globe exploded with fire and rock produced water vapour and gases(2)What happened next?(3)What did the water vapour and gases form?the earths atmosphere Water appeared(4)What appeared as the earth cooled down?water is important for the beginning of life on
21、 the earth.Why is water so important for the beginning of life?Because water allowed the earth to dissolve harmful gases into oceans and seas.partpart2 The development of life2 The development of life small plants appears in water 1.What life developed after water appeared?Shellfish and all sorts of
22、 fish 2.What life developed in water next?green plants began to grow on land insects appeared3.What about the life on land?reptiles appeared dinosaur developed 5.What life developed after forests appeared?mammals on land6.What life developed after dinosaurs?small clever animals7.What life developed
23、after mammals?summary After the“big bang”,the earth was still just a cloud of _,it _loudly with fire and rock,which were _ to produce the_,water vapour and other gases.Then _ began to appeared on the earth.dustexplodedin timecarbonwater _ in water are considered to be the earliest lives on the earth
24、.The O2they supplied encouraged the lives of_.Slowly green plants grew on land,which were followed by _like insects&_.When the plants grew into_,_ appeared.Then _ developed but disappeared later,which made the rise of a totally different animal,_,possible,and finally _ spread all over the world.shel
25、l-fish and fishamphibiansforestsreptilesdinosaursmammalhumansThe small plantsland animalsClever animals with hands and feet(Human beings)Para.5 We have only one earth!We should take care of the earth!ks5u精品课件 Only if we understand can we care;only if we care will we help;only if we help shall all be
26、 saved.Jane Goodall唯有了解，我们才会关心唯有了解，我们才会关心；唯有关心，我们才会行动；唯有关心，我们才会行动；唯有行动，生命才会有希望。唯有行动，生命才会有希望。珍妮珍妮古道尔古道尔As a high school student,what little things can we do for the earth?ride bikes or take a bus or walk to school plant treessave waterWhat can we do for taking care of the earth?Possible answers:save electricity join Earth houruse recyclable products save paper reduce rubbish1.Conclude the text by using 30 words.2.Read the passage after class and underline the language points you dont understand in the text.Thank you very much.Good bye!
