八年级英语下册-Unit-7-Know-Our-World-Lesson-38-The-World-Is-a-Big-Place讲义-(新版)冀教版.ppt

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,*,*,*,Unit 7 Know Our World,Lesson 38 The World Is a Big Place,Think about it!,How many continents are there in the,world?What are they?,What do you know about the place,where you live?,How many continents are there in the,world?What are they?,Africa,Asia,Europe,Oceania,Antarctica,Seven Continents,North America,South,America,The Pacific Ocean,The Indian Ocean,The Atlantic Ocean,The Arctic Ocean,Oceans cover about three-quarters of the earths surface.,desert,Deserts cover twenty percent of the earths surface.,Whats the worlds biggest,island,?,The world,s biggest island is,Greenland,.Greenland is northeast of Canada.,Greenland,Words&expressions,Listen and read.,The earth is a very special planet,and it faces a big problem.In the year 2010,the worlds population was over 7 billion,in total,.It is increasing very quickly.By 2025,the world,may have about 8 billion people.And by 2050,the worlds population may,reach,9 billion.,There is another problem.People cant live everywhere,on the earth,.We cant live in water,and only about,one third of,our planet is land.But parts of this land are very dry.These dry places are called deserts.Some areas have very high mountains.Others have a lot of snow and ice.It is not easy to live in those places.,There are seven continents:Asia,Africa,Australia,Antarctica,Europe,North America and South America.Antarctica,is covered with,snow and ice,all year round,.Luckily,people can live on the other six continents.On these continents,there are green forests,fresh water and rich lands.,Oceans cover,two thirds of,the earths surface.The earth has only one big ocean,but,we use these names for its different parts:the Pacific Ocean,the Indian Ocean,the Atlantic Ocean and the Arctic Ocean.The Pacific Ocean is the largest one.,The earth is our home now,and it will be our home in the future.,It must be treated well,for our children and for our childrens children,too!,Language points,