辛军峰上课用课件.ppt

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1、白银十中白银十中辛军峰辛军峰 Lesson 50 The World Is a Big Place!教学目标教学目标1.认识七大洲，四大洋的英文名称；认识七大洲，四大洋的英文名称；2.学会小数和分数的部分表达法；学会小数和分数的部分表达法；3.了解更多的世界地理知识。了解更多的世界地理知识。教学难点教学难点1.大洲大洋的表达法；大洲大洋的表达法；2.分数小数的表达法。分数小数的表达法。北北南南AsiaEuropeAfricaNorth AmericaSouth AmericaAustraliaAntarcticacontinentsoceans太太 平平 洋洋印印 度度 洋洋北北 冰冰 洋洋大

2、大西西洋洋大大 西西 洋洋The Pacific OceanThe Indian OceanThe Arctic OceanThe Atlantic OceanLook and say1234567ABCCDB.swf1.How many people are there in the world?2.Where do all the people live?3.How big are the worlds oceans?4.How many deserts does the world have?5.Whats the worlds biggest island?6.Whats the wo

3、rlds longest river?Listen to the tape and answer the questions:About six billionOn land.Oceans cover about three-quarters of the earths surface.20 percent.Greenland.The Nile River.Read and finish the exercises:1.Scientists predict the worlds population will have _ By 2025,there will be 9.1 billion p

4、eople by _.2.About _ of the world is land.The land that is very _ is called desert.The deserts cover _ of the earths surface.3.There are _ continents.They are _,_,_,_,North America,South America and Antarctica.Antarctica is worlds _ and the worlds _ continent.4.There are _ main oceans.They cover _of

5、 the earths surface.They are the_,the_,the _ and the Arctic Ocean.The_ is the biggest ocean.The _ is the smallest ocean.5.The worlds biggest island is _.6.The Nile River in Africa is the _ river.7.8 billion2050one-thirddrytwenty percent ofsevenAfricaAsiaAustraliaEuropecoldestdriestfourthree-quarters

6、Pacific OceanAtlantic OceanIndian OceanPacific OceanAtlantic OceanGreenlandlongestLearning Tips1.population n.人口Whats the population of the world?=How many people are there in the world?2.Increase v.增加、增大、增强increase by 增加了 increase to 增加到3.分数的表达法1/2one half=one second1/4a quarter=one fourth2/5two fi

7、fths3/7three seventh 分子用基数，分母用序数；分子大于1，分母加s.4.小数的读法point3.454.680.36three point four fivefour point six eightpoint three sixKnowledge about continents and oceans:Do you know the seven continents in the world?_is the biggest continent.It has the highest point on the Earth in the Himalayas Mountains.T

8、his point is called Mount Everest._is the second largest continent.Elephants,giraffes,zebras,and lions live there both in the jungles and in the desert._is the third largest continent.Canada,Mexico and the United States are the three major countries on this continent.AsiaAfricaNorth America_ is the

9、fourth largest continent.There are 13 countries on this continent._is located at the South Pole.It is the fifth largest continent.There are beautiful penguins._ is the sixth largest continent.It is a good place for people to travel to._ is the smallest continent.On the earth there are four oceans.You can see water everywhere._is the biggest._ is the second largest ocean.Then _and the Arctic are the oceans third and fourth in size.South AmericaAntarcticaEuropeAustraliaThe PacificThe Atlanticthe IndianHomework1.阅读课文，默写本课的新词；2.将本单元关于亚洲、欧洲、北美洲的课文读一读；3.继续搜集有关地里的知识。See you!