Unit 7 Know Our World.Lesson 38 The World Is a Big Place.课件

课件20张PPT。 Lesson 38
The World Is a Big Place!New Words planet n. 行星
billion n. 十亿；千兆
total n. 总计；总数
adj. 总的；总计的
increase v. 增加；增大
surface n. 表面；表层
Indian adj. 印度的
n. 印度人
Atlantic n./adj. 大西洋（的）
Arctic adj. 北极的billion:
1.There are more than 1.4 billion people in China.
2.How many billions of people are there now in the world.total1.名词
Our school has a total of 6000 students.
The boy raised 1000 dollars in total to buy the bicycle.(总计)
2.形容词
What’s the total population of Japan??（总的）
increaseincrease V.增加，增大
The population is increasing so quickly that we have to face many problems.
Think about: What is increasing now?PracticePage101
Let’s do it.Ex2*Listening：
Fill in the blanks
1.By 2025,the world’s population may have about __ billion people.
2.Oceans cover __ __
of the earth’s surface.
8two thirdsFast-reading
Task-based Reading
1.判断(T/F)People can live on the seven continents.
2.Antarctica is covered with_____________
all year round.
3.What are problems the earth faces?
4.找出并写下第四段的主题句________
5.翻译 It must be treated well for our chidren and for our children's children, too.
snow and iceOceans cover two thirds of the earth’s surface.为了我们的孩子和孩子的孩子，我们也应该很好地对待地球。The increasing population.FLanguae Points1.We can’t live in the water ,and only about one third of our planet is land.
One third 1/3,two thirds 2/3
规律记忆：分子基，分母序，分子大于一，分母加s.
Eg:中考再现1.It is said that ___of the water _____polluted .
A.Two three; is B.two thirds; is
C.Two thirds; are D.two third; are
2.About ＿＿of the students ___keeping diaries in English in our class.
A.two fifth,like B.two fifths,like
C.two fifth,likes D.two fifths,likesBBThink about:
“二分之一”和“四分之一”该怎么表达？2.Can you find out anything in common?:These dry places are called deserts.
Antarctica is covered with snow and ice all year round.
It must be treated well for our children……
学以致用：把下面的句子变成被动语态
Oceans cover two thirds of the earth’s surface.
Two thirds of the earth’s surface is covered with oceans.Reading time
Guessing time(谜语时刻) Group work:
Describe your favourite continent,others guess what place it is.You can talk about its weather,cities,features,population,area and so on. You are the winners!North AmericaAfricaEuropeSouth AmericaAustraliaAsiaAntarcticaHomework:Writing
The earth is our home now ,but it faces many problems.
What can we do to protect it?Thank you , bye!