新冀教版八年级下册英语Lesson 38 The World Is a Big Place课件

1、Unit 7 Know Our WorldLesson 38 The World Is a Big Place学习目标Learn more about the worlds geography.Master the words and expressions of the continents and oceans in English.思 考新课导入思 考All of us have studied geography. Can you say the names of the continents and oceans in the world?新课导入思 考新课讲解THINK ABOUT

2、 ITHow many continents are there in the world? What are they?What do you know about the place where you live?How many continents and oceans does the world have?Can you point them out?新课讲解The earth is a very special pla , and it faces a big problem. In the year 2010, the worlds population was over 7

3、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 pla is land. But part

4、s 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.新课讲解There are seven continents: Asia, Africa, Australia, Antarctica, Europe, North America and South America. Antarctica is

5、 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: t

6、he 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！新课讲解Language point 1The earth is a very spe

7、cial pla , and it faces a big problem.pla / plnt/ n. 行星pla 为可数名词，指环绕恒星运转的星球。e.g. The earth is the only pla that we know has life at present.地球是目前我们所知的唯一有生命存在的行星。新课讲解Language point 2In the year 2010, the worlds population was over 7 billion in total.billion / bln/ n十亿；千兆billion前有数词修饰时，billion 不能用复数形式

8、。e.g. We want two billion. 我们想要20 亿。billions of意为“数十亿的”，表示不确定的数量。e.g. There are billions of stars in the sky.天上有数十亿的星星。新课讲解Language point 3It is increasing very quickly.increase既可作及物动词也可作不及物动词，其反义词为decrease。也可作名词，常用短语on the increase“正在增加；不断增长”。e.g. These cases are on the increase. 这些案件在不断增加。e.g. His

9、 power increased. 他的权利加强了。increase/nkris/v.增加；增大新课讲解Language point 4Antarctica is covered with snow and ice all year round.主动结构为：cover.with.(用盖住)e.g. Please cover this desk with a cloth. 请用布盖住这张课桌。be covered with 被覆盖e.g. Our garden is covered with grass and flowers.我们的花园被花草覆盖着。新课讲解1Read the lesson a

10、nd match each paragraph with its main idea.Lets Do It !Paragraph 1 a.Six of the seven continents are good for people to live on.Paragraph 2 b.We should treat the earth well.Paragraph 3 c.An increasing population is a big problem for the earth.Paragraph 4 d.Two thirds of the earth is covered with oce

11、ans.Paragraph 5 e.People cannot live everywhere on the earth.新课讲解2 Fill in the blanks with the correct forms of the words in the box.increase dry surface billion total1The number of swimmers here is _ quickly because its very hot these days.2The school has a _ of 900 students.3I think it may be the

12、_ season of the year.4The _ of our body is skin. It protects us.5How many _ of people are there in the world now?increasingtotaldriestsurfacebillions当堂小练一、词语运用1. The s_ of the lake is quite still. 2. The t_ cost will be 130 dollars. 3. The earth is a p_and it goes around the sun. 4. They e from Indi

13、a, and they are I_. 5. The number of wild pandas has i_ by around 17% in the last ten years. urfaceotalla ndiansncreased当堂小练二、连词成句1. pla , earth, is, special, the, a_. 2. in, we, live, water, cant_. 3. deserts, dry, called, these, places, are_. 4. must, earth, well, the, treated, be_. 5. cover, surface, thirds, the, oceans, two, earths, of_. The earth is a special pla We cant live in waterThese dry places are called desertsThe earth must be treated wellOceans cover two thirds of the earths surface课堂小结重点单词：increase,pla ,b