Unit 1 Topic 2 The population in developing countries is growing faster.Section B课件（19张PPT无音频）

课件19张PPT。Topic 2 The population in
developing countries is
growing faster.
Section B
Learning Objectives:
Master the new words , phrases
and sentences.
2. Learn how to read big numbers in
English.
3. Talk about the population in different countries.
1,000,000,000
one billion1,000,000
one million
1,000
one thousand3.14
three point one four100
one hundred Look, read and learnTask 1: NumbersFirst, try to separate the number in groups of three from right to left.
Then read it in order from billion to million and thousand.How to read numbers?1 , 0 0 0 , 0 0 0 , 0 0 0billionmillionthousand1 0 0 0 0 0 0 0 0 0 2 Listen and read the numbers, paying special attention to the intonation. Then read the other numbers with your partner.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 two973
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 forty2 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 What’s the population of the world?Task 2: Pre-listening1. Listen to 1a and
match the information.Task 3:While- Listening2. Make similar conversations after
the example.Example:
A.: What’s the population of the world?
B: It’s about 6.8 billion.1c Read 1a and fill in the blanks. The world has a population of 6.8 billion and it is increasing by __________ every year. _______ has the largest population. It has already reached __________ and India is _________ with 1.1 billion. The population in developing countries is ______ and is growing ________ than that in developed countries. Luckily, our country has carried out the ___________ policy to control the population.80 millionChina1.3 billionsecondlargerfasterone-childTask 4: Post-listeningA：What a large population ! The world … 6.8 billion.
… 80 million every year.
B：Which country …?
A：China … reach…,
and India …with ….
B：… the USA?
A：309 million.
B：It shows … developing countries … developed countries.
A：…is growing faster …
B：So it is. The population problem … developing countries
A：China … carry out … control the population.Act out the dialogThe supermarket is very crowded.
So it is. So +主语+ be/情态动词/助动词Lucy dances very well.She has cleaned the room.
So she does.
So she has.So it is. Language points确实如此。e.g. The population of this city is nearly
300 000. 这个城市的人口将近三十万。
e.g. 80% of the population in China are
farmers. 中国百分之八十的人口是农民。 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。强调人口的具体分布或构成 (作复数） population集合名词 某地整体人口的数量(作单数） 通常用large/ big/ small 来修饰。 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. 2502502502502502505003 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?
2. What can you tell from the population in developing
countries and in developed countries?
3. What problems does the large population cause?
4. What measures do you think should be taken to control the
population?
China has the largest population. The population of China is 1.3 billion. Canada has the smallest population. The population of Canada is 34 million.
The population in developing countries is larger than that in developed countries.
The large population may cause less living space, more pollution and so on.summaryWe learn:1. Read numbers in English.
2. Talk about population problems.We can:1. Some words:
population, billion, increase, reach, luckily, policy,
Russia, measure
2. Some phrases:
increase by, developing countries, developed
countries, carry out, the one-child policy
3. Some sentences:
What a large population!
The world has a population of 6.8 billion.
So it is. 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. lessCDDAExercisesThank you.