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,*,U,nit 4 Astronomy:the science of the stars,景泰二中,教师：李明鸣,2012,年,3,月,29,Unit 4,Astronomy:,the science of the stars,What do you,know,about astronomy?,Step I Lead-in,What is 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.,Step II,Warming up,What are the names of the eight,planets that circle our sun?,海王星,Neptune,水星,Mercury,金星,Venus,地球,Earth,火星,Mars,木星,Jupiter,土星,Saturn,天王星,Uranus,A Quiz,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 humans on the earth?,A.About 3.5 billion B.About 4.5 billion,C.About 5.5 billion D.About 6.5 billion,5.How long does the rotation(,自转,)of the earth take?,A.12 hours B.24 hours,C.a month D.365 days,6.Which continent is the smallest?,A.Africa B.North America,C.South America D.Oceania,7.On what day is the Earth day celebrated?,A.April 22 B.May 4,C.August 21 D.November 11,8.Which ocean is the largest?,A.The Pacific Ocean,B.The Arctic Ocean,C.The Indian Ocean,D.The Atlantic Ocean,9.Which country has the largest area?,A.Canada B.China,C.Russia D.U.S.A,1.The origin of life on earth is a question that interests astronomers.What do you know about it,?,How old is the universe?,(several billion years ago),How old is the Earth?(between 4.5 and 3.8 million years ago),Which were the first creatures or plants on Earth?.,Pre-reading,2,.,E,ach religion,and,culture has its own ideas about,how life,beg,an on earth.What do you know?,In China,we all know that,Pangu,separates the sky from the earth and,Nvwa,made humans.,Pangu,separates the sky from the earth.,中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌,将天地分开。死后,他的气息化成风和云,声音变成轰轰的雷声,左眼化为太阳,右眼化为月亮,手足与四肢变成大地的四极与五方的名山,血液化成江河,筋脉铺成道路,肌肉形成田地,须发成为星星,牙齿和骨骼化为金属、珍珠、玉石,汗水成为滋润万物生长的甘霖和雨露。,Nvwa,made humans.,Other legends about the beginning of universe.,The Biblical Account,Day 1:,God spoke and separated light from darkness creating Day and Night.,Day 2:,God spoke and separated the water creating sky and ocean.,Day 3:,God spoke and created dry land.,Day 4:,God spoke and created the sun,moon and stars.,Day 5:,God spoke and created living creatures in the air and sea.,Day 6:,God spoke and created the land animals and man.,Day 7:,God rested and blessed this day calling it Holy.,India,Brahma is the god first represented in the Hindu Triad.He is the creator of the universe and all living beings are said to have evolved from him.,3.Read the title and look at the pictures.Predict what the reading will be about.Then read it quickly to check if you are right.,Summary,In this class,we have talked a lot,about astronomy and learnt more about,knowledge of it.At the same time,we,have also accumulated much more,words and phrases for the next periods,of this unit.Thats all.,Homework,1.Preview reading“How life began on the earth”.,2.Remember words and phrases in unit 4.,Thank,you,