资源简介

(共21张PPT)
Section B
Unit 1 The Changing World
Topic 2 The population in developing countries is growing faster.
numbers in our lives
one hundred and fifty yuan
thousands of people
two point two six (2.26) meters tall
two thousand and eight Olympic Games
1,000,000,000
one billion
1,000,000
one million
1,000
one thousand
3.14
three point one four
100
one hundred
Look,read and learn
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.
How to read numbers
1 , 0 0 0 , 0 0 0 , 0 0 0
billion
million
thousand
1 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.
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
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
1 , 0 0 0 , 0 0 0 , 0 0 0
billion
million
thousand
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
1 , 0 0 0 , 0 0 0 , 0 0 0
billon
million
thousand
6800
80
80
80
The population is increasing by 82 million every year.
= The world has a population of 7.2 billion.
What a large population!
1b Listen to 1a and match the information.
1. the world 2. China 3. India 4. the USA
A. 323 million B.7.2 billion C. 1.36 billion D. 1.27 billion
Make similar conversations after the example.
Example:
A.: What’s the population of the world
B: It’s about 7.2 billion.
1. the world 2. China 3. India 4. the USA
A. 323 million B. 7.2 billion C. 1.36 billion D. 1.27 billion
1c Read 1a and fill in the blanks.
The world has a population of 7.2 billion in 2014 and it is increasing by __________ every year. China’s population has already reached ________ and India has _________ of 1.27 billion. As the population _______, there will be more pollution and other serious problems. We should find new ways to ________ the environment for example, making new rules and policies.
82 million
China
1.36 billion
second
larger
faster
solve
1a Listen，look and say.
11-1a音频
The 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。
A：What a large population ! The world … 7.2 billion.
… 82 million every year.
B：Which country …
A：China … reach…,
and India …with ….
B：… the USA
A：323 million.
B：So it is. How to solve the population problem
A：I think … carry out … solve the population.
Act out the dialog
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 problems does the large population cause
3. What measures do you think should be taken to solve the
population problem
China has the largest population. The population of China is 1.36 billion. Canada has the smallest population. The population of Canada is 3 million.
The large population may cause less living space, more pollution and so on.
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
Exercises
summary
We 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, carry out
3. Some sentences:
What a large population!
The world has a population of 7.2 billion.
Neither do I.
Homework
2. Read the numbers in
Part 2 on P12.
1. Read 1a aloud.
3. Finish Section B in
your workbook.
4. Preview Section C.
Thank you.
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）
BACK
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.
250
250
250
250
250
250
500
BACK

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