1、Unit 4Unit 4 Astronomy:Astronomy:the science of the starsthe science of the stars In our solar system eight planets circle around the sun.What are they?Can you match the names with the planets?Look at the picture and match the names with the planets.Warming upMercury Venus EarthMarsJupiterSaturnUran
2、usNeptune金星金星地球地球水星水星土星土星木星木星天王星天王星海王星王星火星火星The origin of life on the earth is a question that interests astronomers.what do you know about it?Each religion and culture has its own ideas about how life began on earth.What do you know about it?Do you believe the passage tell you the truth about the b
3、eginning of life?Why?The beginning of the lifePangu separated Nvwa created God created the sky humans the world 盘古开天女娲造人上帝创世论China legend:Pangu separates the sky from the earth The development of the lifebreathwinds and cloudsvoice thunder left eye the sun right eye the moon blood the rivers veins t
4、he roads China legend:The Goddess Nuwa mended the heaven and created human beings from the clay(粘土粘土).Religious Beliefs According to Bible,God created the world in seven days.Day 1:God created Day and Night.Day 2:God created sky.Day 3:God created dry landthe earth,and seas.Day 4:God created tow grea
5、t lights(the sun,the moon)and stars.Day 5:God created living things in the air and sea.Day 6:God created the land animals and the first man.Day 7:God rested and called this day Holy.Reading Reading How Life Began on the EarthHow Life Began on the EarthReading Reading Reading How life began on the ea
6、rthRead the text quickly and write down the main idea for each paragraph.Main idea of each paragraphParagraph 1:Paragraph 2:Paragraph 3:Paragraph 4:a.The importance of water for life b.The development of plants and animals on the earth c.The formation of the earth d.A widely accepted theory about th
7、e formation of the universe dcab e.The arrival of humans and their impact on the earth Paragraph 5:eRead the paragraph 2 and 3 carefully and think about How the earth come into being?.1.Big Bang2.a cloud of dust3.A solid globe4.exploded with fire and rock5.produce the water vapour,carbon dioxide-atm
8、osphereHow did the earth come into being?Para2,36.cooled down7.water appeared8.Dissolved harmful gases and acidThe development of lifeThe development of life Para4,5extremely small plants Firstearly shellfishStage 1:The development of life in waterall sorts of fish green plants on land insects on la
9、ndStage 2:The development of life on land Nextamphibians on land and in the waterGreen plants grew into forests Later reptiles on land dinosaurs on land(1)What life developed after forests appeared?After thatmammals on land(2)What life developed after dinosaurs?small clever animals(3)What life devel
10、oped after mammals?Finally Work in pairs.Put the order of developmentof life into a timeline.10 73 8 4 9 6 1 5 2 12 111.Insects and amphibians appeared.3.The earth became a solid ball.5.Reptiles appeared.7.The earth was a cloud of dust.9.Shellfish and other fish appeared.11.Clever animals with hands
11、 and feet appeared.2.Dinosaurs appeared.4.Small plants grew on the water.6.Plants began to grow on dry land.8.Water appeared on the earth.10.The universe began with a Big Bang.12.Mammals appeared.1.Why was the earth different from the other planets?Because water remained on the earth.2.Why did the p
12、lants grow before the animals came?Because plants provided oxygen for animals to breathe.3.Why is it wrong to show films with dinosaurs and people together?Because dinosaurs died out long before human beings developed on the earth.4.There used to be nine planets in the solar system.Recently scientis
13、ts have decided that one of them can no longer be considered a planet.Do you know the name of that planet?Do you know why they removed it?The name is Pluto.Scientists now think it is too small to be called a planet.5.What problem is caused by human beings?Human beings cause global warming.After the
14、,the earth was just .Slowly,it began to combine into moving around the sun.After it exploded loudly,the explosion produced ,_and other gases.“Big Bang”a cloud of dust carbon,nitrogenthe water vapour a solid globeRetell As the earth cooled down,_ began to appear on its surface.Because of water and ot
15、her useful gases,and later_ appeared.Many millions of years later,began to grow ,which led to the appearance of .watersmall plants grewshellfish and other fishinsects and amphibiansthe first plantson land When the plants grew into forests,.Later,.When they disappeared,became more important.At last,_
16、 _ have became the most important animals on the planet.reptiles appeareddinosaurs developed mammalshumanbeings Group Discussion1.What problems are caused by human beings?2.How to solve these problems?Homework1.Find out language points and noun clauses in the reading passage.Discuss and analyse them.2.Writing:Rewrite the passage and use as many language points and new words as possible.We have only one earth!We should take care of the earth!
