新人教必修三-Unit-4-Astronomy-Reading[课件] (2).ppt

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1、新人教必修三新人教必修三-Unit-4-Astronomy-Reading课件件海王星海王星 Saturn Saturn 水星水星Uranus Uranus 金星金星Venus Venus 地球地球Earth Earth 火星火星Mars Mars 木星木星Mercury Mercury 土星土星Jupiter Jupiter 天王星天王星Neptune Neptune 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

2、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 billion5.How long

3、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 Earth day celebrated?A.April 22 B.May 4 C.August 21 D.November 118.Which ocean is the largest?A.The Pacific Oce

4、an 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.APrediction Look at the picture.Do you know the topic of this unit?Do you know how our life began on the earth?After the“Big Bang”,the earth was full of water.Original ce

5、lls appeared in the ocean.The cells in the water began to separate.Marine animals came into being.Some animals(amphibian&insects)came to land.Reptile appeared.dinosaurs dinosaurs MammalsMan had evolved from apes.They developed new methods of growing food,hunting and moving around.As time went by the

6、y covered the earth and have become the most important animals on the planet.Do you know any ancient idea about the beginning of the universe?Big BangPangu separates the sky from the earth.中国神话传说中有盘古开天地的说法。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巨人盘古用一把利斧劈开混沌,将天地分将天地分开。死后开。死后,他的气息化成风和云他的气息化成风和云,声音变声音变成轰轰的雷声成轰

7、轰的雷声,左眼化为太阳左眼化为太阳,右眼化为右眼化为月亮月亮,手足与四肢变成大地的四极与五方手足与四肢变成大地的四极与五方的名山的名山,血液化成江河血液化成江河,筋脉铺成道路筋脉铺成道路,肌肌肉形成田地肉形成田地,须发成为星星须发成为星星,牙齿和骨骼牙齿和骨骼化为金属、珍珠、玉石化为金属、珍珠、玉石,汗水成为滋润万汗水成为滋润万物生长的甘霖和雨露。物生长的甘霖和雨露。Nvwa made humans.Other legends about the beginning of universe.The Biblical AccountDay 1:God spoke and separated li

8、ght 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

9、 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.Big BangGasNew starsDying starsremnants平面图平面图 太阳系太阳系地球大气地球大气1.When did the“Big Bang”ha

10、ppen?It happened several billion years ago.Scanning Read the passage quickly and answer the questions.2.What form was the earth after the“Big Bang”?The earth was still just a cloud of dust.3.What made up the earths atmosphere after the earth exploded?Carbon,nitrogen,water vapour and other gases.4.Ho

11、w did water come into being on the earth?As the earth cooled down after it exploded,water came into being.5.Whats the significance of the presence of water on the earth?It allowed the earth to dissolve harmful gases and acids into the oceans and seas.6.What was important to the development of fish?o

12、xygen.7.What made possible the rise of mammals on the earth?The disappearance of dinosaurs made the possible the rise of mammals on the earth.8.Why are mammals different from all life forms in the past?They gave birth to young baby animals and produced milk to feed them.（）A Insects and amphibians ap

13、peared.（）B Dinosaurs appeared.（）C The earth became a solid ball.（）D Small plants grew on the water.（）E Reptiles appeared.（）F Plants began to grow on dry land.（）G The earth was a cloud of dust.（）H Water appeared on the earth.（I Shellfish and other fish appeared.（）J The universe began with a“Big Bang”

14、.（）K Clever animals with hands and feet appeared.（）L Mammals apeared.5106）2948371 Detailed readingPut the order of development of life into a time line.12 11 Choose the main idea for each paragraph()The arrival of humans and their impact on the earth.()The formation of the earth.()The development of

15、 plants and animals on the earth.()A widely accepted theory about the formation of the universe.()The importance of water for life.54213II.Answer the following questions.1.Why was the earth different from other planets?The water remained.2.Why did the plants grow before the animals came?Because plan

16、ts provide oxygen for animals to breathe.3.Why is it wrong in films and stories to show dinosaurs and people together?Because dinosaurs died out long before human beings developed on the earth.4.Why do you think that humans are the cleverest animals on the earth?They are the cleverest animals becaus

17、e they have larger brains than any other creature on the earth so far.5.There used to be nine planets in the solar system.Recently scientists 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?Pluto.Scientists now th

18、ink it is too small to be called a planet.6.What problem is caused by human beings?They cause global warming.III.Fill in the blanks in the following form.AtomsviolentatmospherepresenceacidsoxygenshellfishamphibiansReptilesexistedgave birth tocleverdioxideIV.True(T)or False(F).1.The earth appeared be

19、fore the Big Bang happened.2.The original atmosphere consisted of nitrogen and oxygen.3.The main difference between the earth and other planets is that there is water on the earth.4.Life began in water and then on land.FFTT5.Mammals appeared before the development of dinosaurs.6.Dinosaurs could give

20、 birth to young baby animals and produced milk to feed them.7.Human beings produce too much carbon dioxide which causes the global warming on the earth.8.According to the text,human beings would disappear in the end.FFTFHow life began on the earth“Big Bang”other bodies_ starsEarth:a cloud of _atomsd

21、ustSummary a solid _the earths _other 4._Water:_ to the development of lifewater vapour nitrogen carbonextremely small _ on the surface of the waterglobegasesatmospherefundamentalplantsearly _ and all sorts of fishgreen plants on landland animalsinsectsamphibians_huge animals(dinosaurs)the rise of _

22、human beingsshellfishreptilesmammalsWe have only one earth!Speaking What should we do for our earth?You can use the following words or phrases to help you:prevent from harmful global warming carbon dioxide in turn depend on as a result thus atmosphereSpeaking What should we do for our earth?Lets take part in the activities to save the earth!How life began on earth is one of the biggest puzzles that scientists found hard to solve.What other puzzles are hidden in the passage?Find them out and do some research.谢谢观赏谢谢观赏