仁爱科普版九年级上册Unit 1 Topic 2 The population in developing countries is growing faster.Section B课件(共19张PP

(共19张PPT)
Unit 1 The Changing World
Topic 2 The population in developing countries is growing faster.
Section B
By the end of the class, you will be able to
1.Master the following words ,phrases and sentences:
Words： population, billion, increase, reach, luckily, policy, Russia, measure
Phrases: increase by, developing countries, developed countries, carry out,
the one-child policy
Sentences：①What a large population!
② So it is.
2. Read numbers in English.
3. Talk about population problems.
选用所给单词或词组填空
already, yet, ever, never, have been to，just
1. Tom has _______________finished his homework. Now he is playing football on the playground.
2 . Have you __________ been to the Great Wall
3 . She hasn't come back _______________.
4. I have ____________heard of that before. It is so strange.
5.Has he kept the book _______________
6.—Have you seen the film —Yes. I have __________________seen it.
7. ___________you ever been to ___________ Hainan.
just / already
ever
yet
never
yet
just / already
Have
been to
1a Listen, look and say.
So it is.
The population in developing countries is growing faster.
So +主语+ be/情态动词/助动词
So it is. 确实如此。
通常用large/ big/ small 来修饰。
e.g. The population of China is very large. 中国人口众多。
The population in this area is becoming smaller and
smaller. 这个地区的人口越来越少。
population
e.g. The population of this city is nearly
300, 000. 这个城市的人口将近三十万。
集合名词 某地整体人口的数量(作单数）
强调人口的具体分布或构成 (作复数）
e.g. 80% of the population in China are farmers. 中国百分之八十的人口是农民。
increase by + 数字 / 倍数 / 百分数 增加了……
e.g. The price of the house has increased
by three times.
increase to +数字 增加到……
e.g. The price of the house has increased
to 500 000.
1. the world 2. China 3. India 4. the USA
A. 321 million B.7.2 billion C. 1.36 billion D. 1.27 billion
1b Listen to 1a and match the information.
1c Read 1a and fill in the blanks.
The world has a population of 7.2 billion and it is increasing by __________ every year. _______ has the largest population. It has already reached __________ and India is _________ with 1.27 billion. The population in developing countries is ______ and is growing ________ than that in developed countries. Luckily, our country has carried out some policies to ______the problem.
90 million
China
1.37 billion
second
larger
faster
solve
2. Listen and read the numbers, paying special attention to the intonation.Then read the other numbers with your partner.
How to read numbers
1 , 0 0 0 , 0 0 0 , 0 0 0
thousand
million
billion
First, try to separate the number in groups of three from right to left. Then read it in order from billion to million and thousand.
1 , 0 0 0 , 0 0 0 , 0 0 0
thousand
million
billion
543.7
five hundred and forty-three point seven
1 562
one thousand, five hundred and sixty-two
6 004 001
six million, four thousand and one
7 198 764 502
seven billion, one hundred and ninety-eight million, seven hundred and sixty-four thousand, five hundred and two
973
nine hundred and seventy-three
3 980
three thousand , nine hundred and eighty
98 721
ninety-eight thousand , seven hundred and twenty-one
768 540
seven hundred and sixty-eight thousand , five hundred and forty
2 346 780
two million, three hundred and forty-six thousand, seven hundred and eighty
82 346 580
eighty-two million, three hundred and forty-six thousand, five hundred and eighty
405 000 000
four hundred and five million
5 555 555 555
five billion, five hundred and fifty-five million, five hundred and fifty-five thousand, five hundred and fifty-five
= The world has a population of 6.8 billion.
3 Work in groups and discuss the population of the world. The following chart and questions may help you.
1. Which of these 5 countries has the largest/smallest
population What’s the population of it
China has the largest population. The population of China is 1.36 billion. Canada has the smallest population. The population of Canada is 36 million.
The population in developing countries is larger than that in developed countries.
2. What can you tell from the population in developing countries and in developed countries
4. What measures do you think should be taken to control the
population
3.What problems does the large population cause
The large population may cause less living space, more pollution and so on.
答案不唯一，言之有理即可。
Choose the best answer.
1. — ______ is the population of Russia
— 143 million.
A. How much B. How many C. What D. How
2. There are ______ students in our school.
A. three thousands B. three thousands of
C. three thousand of D. three thousand
3. — Jenny always helps others.
— _____.
A. So is she B. So she is C. So does she D. So she does
4. The population of China is _____ than that of Japan.
A. larger B. more
C. fewer D. less
C
D
D
A
We learn:
1. Some words:
population, billion, increase, reach, luckily, policy, Russia, measure
2. Some phrases:
increase by, developing countries, developed countries, carry out
3. Some sentences:
What a large population!
So it is.
We can:
1. Read numbers in English.
2. Talk about population problems.
1.Make up a conversation like 1a.
2. Preview Unit 1 Topic 2-Section C.