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(共25张PPT)
Unit 5 Water is life
主题范畴：
人与自然
主题群：
环境保护
子主题：
环境污染及原因，环保意识和行为
Key question
What does water mean to us
understand the usefulness and importance of water.
identify some facts about water in daily life.
explore how to save water and use it wisely.
describe the relationship between water and the development of our society.
Unit objectives 单元目标
I can:
New words
population n. 人口
agriculture n. 农业
trade n. 贸易；买卖
industry n. 工业；生产制造
role n. 角色
goods n. 商品；货品
overseas adv. 在国外；向海外
global adj. 全球的；全世界的
income n. 收人；收益；所得
nearly adv. 几乎；差不多；将近
business n. 买卖；生意
*leisure n. 闲暇；空闲；休闲
throughout prep.自始至终；贯穿整个时期
duty n.责任；义务
play a role in ... 在……起作用
steam engine 蒸汽机
as a result 作为结果；因此
make sure 确保；设法保证
Lead in
What do these cities have in common
NEW YORK
LONDON
SHANGHAI
They are all by the river or by the sea.
Focusing on culture
Water is not only essential for life, but is also important for human society. Let’s explore the role water plays in the development of cities.
Read the article and find out why water is important for cities.
Reading
Read line 1-5 and answer the quesion.
If you look at a population map of any country in the world, you will see that most people live close to water. The world’s biggest cities are next to rivers, lakes or the sea. This isn’t an accident. We use water for all kinds of things in everyday life, and we also need it for agriculture and for trade.
Why are the world’s biggest cities often next to rivers, lakes or the sea
Because we use water for all kinds of things in everyday life, and we also need it for agriculture and for trade.
Task 1
Read line 6-14 and answer the quesion.
In fact, water creates jobs and helps different industries to develop. At the end of the 18th century, water played a big role in the Industrial Revolution. Water powered the first machines in the clothes industry, such as Richard Arkwright’s spinning machines. It also provided the first steam engines with steam. Thanks to rivers and oceans, businessmen could ship their goods overseas.The growing global trade created more jobs and provided more income for people. As a result, the cities that were close to water grew much larger.
What role did water play in the Industrial Revolution
Water powered the first machines in the clothes industry, and it also provided the first steam engines with steam.
Background
水在工业革命中起到的作用
(1) Powering the first machines in the clothes industry
理查德 阿克莱特
纺纱机
(2) Provide steam for the steam engine
(3) Promote trade development
Read line 15-20 and answer the quesion.
By 2008, over half of the world’s population lived in cities. Nearly all of these cities are on the coast or by rivers or lakes. This is because cities need water for people’s homes, industry, business, tourism and leisure activities.Throughout history, water helped create and develop cities. It is now our duty to make sure we don’t waste water or pollute it.
Why do nearly all big cities locate on the coast or by rivers or lakes
Because cities need water for people’s homes, industry, business, tourism and leisure activities.
Task 2
Complete the sentences with the words and the phrase below. Change the form if necessary.
(1) This town is on an island, so many people work in the fishing ____________.
(2) Pollution is a(n) ____________ problem. All the countries in the world need to work together to solve it.
(3) Around a thousand years ago, the weather became drier and drier in this area. ____________, people left.
(4) ____________ all of the water on Earth is salt water, so we cannot drink it.
(5) The world ____________ is very large: there are now more than 8 billion people on Earth!
industry
global
As a result
Nearly
population
What might be the disadvantages of living in cities near rivers, lakes or the sea Discuss in groups.
Floods may happen. When there is too much rain, the water can rise and flood the city, damaging houses and other buildings.
There could be water pollution. Factories or people might put dirty things into the water, making it smelly and not good for swimming or fishing.
High humidity. Living near water can make the air very humid. It may make our clothes and furniture feel damp.
Mosquito problems. Standing water near the city can be a good place for mosquitoes to breed. Mosquitoes can bite us and make us feel itchy.
High property prices. Because these areas are popular, the cost of buying or renting a house can be very high.
Notes
各种各样的
在……方面扮演重要角色
蒸汽机
幸亏；由于；因为
全球贸易
因此
在海岸边
确保
根据提示完成短文
Water is of great significance in our lives. We can see that most people live close to water. Water is used for _____________ (各种各样的) things in life, agriculture and trade. It _________________ (在……方面扮演重要角色) creating jobs.
______________ (幸亏；由于；因为) water, at the end of the 18th century, the Industrial Revolution happened. People used water to power the first steam engines, and ____________ (全球贸易) developed. Businessmen could ship their goods overseas, and __________ (因此) the cities close to water grew much larger.
Even now, a large part of the world's population lives in cities near water, either _____________ (在海岸边) or by lakes. We should ________ (确保) we make good use of water and don't pollute it.
all kinds of
plays an big role in
Thanks to
global trade
As a result
on the coast
make sure
Thank you!

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