1. Topic 2 The population in developing countries is growing faster.
Unit 1 The Changing World
Topic 2 The population in developing countries is growing faster.
Section B

2. numbers in our lives two point two six (2.26) meters tall
one hundred and fifty yuan
numbers in our lives
two thousand and eight Olympic Games
thousands of people
two point two six (2.26) meters tall

3. Look,read and learn 3.14 1,000,000 three point one four one million
100
one hundred
1,000,000,000
one billion
1,000
one thousand

4. 2 Listen and read the numbers, paying special attention to the intonation. Then read the other numbers with your partner.
How to read numbers?
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
billion
million
thousand

5. 1 , 0 0 0 , 0 0 0 , 0 0 0 billion million thousand 543.7
five hundred and forty-three point seven
1 562
one thousand, five hundred and sixty-two
six million, four thousand and one
seven billion, one hundred and ninety-eight million, seven hundred and sixty-four thousand, five hundred and two

6. 1 , 0 0 0 , 0 0 0 , 0 0 0 billion million thousand 973
nine hundred and seventy-three
3 980
three thousand , nine hundred and eighty
98 721
ninety-eight thousand , seven hundred and twenty-one
seven hundred and sixty-eight thousand , five hundred and forty

7. 1 , 0 0 0 , 0 0 0 , 0 0 0 billon million thousand 2 346 780
two million, three hundred and forty-six thousand, seven hundred and eighty
eighty-two million, three hundred and forty-six thousand, five hundred and eighty
four hundred and five million
five billion, five hundred and fifty-five million, five hundred and fifty-five thousand, five hundred and fifty-five

8. = The world has a population of 6.8 billion.80 80 80
6800
The population is increasing by 80 million every year.
What a large population!

9. A. 309 million B. 6.8 billion C. 1.3 billion D. 1.1 billion
1b Listen to 1a and match the information.
1. the world China India the USA
A. 309 million B. 6.8 billion C. 1.3 billion D. 1.1 billion

10. A. 309 million B. 6.8 billion C. 1.3 billion D. 1.1 billion
Make similar conversations after the example.
Example:
A.: What’s the population of the world?
B: It’s about 6.8 billion.
1. the world China India the USA
A. 309 million B. 6.8 billion C. 1.3 billion D. 1.1 billion

11. 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 million
China
1.3 billion
second
larger
faster
one-child

12. 1a Listen，look and say.

13. She has cleaned the room. The supermarket is very crowded.
Language points
So it is.
确实如此。
So she does.
So it is.
So she has.
She has cleaned the room.
The supermarket is very crowded.
Lucy dances very well.
So +主语+ be/情态动词/助动词

14. A：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 dialog

15. 3 Work in groups and discuss the population of the world
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?
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.

16. Exercises 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

17. summary We learn: 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.
We can:
1. Read numbers in English.
2. Talk about population problems.

18. Homework 1. Read 1a aloud. 2. Read the numbers in Part 2 on P12.
3. Finish Section B in
your workbook.
4. Preview Section C.

19. Thank you.

20. population 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。
集合名词 某地整体人口的数量(作单数）
e.g. The population of this city is nearly
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。
population
强调人口的具体分布或构成 (作复数）
BACK

21. e.g. The price of the house has increased by three times.
250
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
250
250
250
500
250
250
BACK