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Unit 5 Water is life
Focusing on culture & Cross-curricular connection
Today’s Goals
After this lesson, I will be able to:
1. Understand how water resources shape city development.
2. Discuss the advantages and disadvantages of living in a city located near
a river, lake, or ocean.
3. Find key information and identify important data through reading a
scientific text.
4. Develop a strong sense of responsibility for protecting water.
What do these cities have in common?
NEW YORK
LONDON
London
Paris
New York
Sydney
Shanghai
They are all big cities by the river or by the sea.
Look and answer
What is the relationship between water and the development of cities?
Let’s explore the role water plays in the development of cities.
Pre-reading
Scan the passage and match each paragraph with its main idea.
Para. 1
Para. 2
Para. 3
Cities need water for people’s homes, industry, business, tourism and leisure activities.
Water helps create jobs and develop industries.
Most people live close to water.
While-reading
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.
While-reading
What role did water play in the Industrial Revolution?
1.Water powered the first machines in the clothes industry, and it also provided the first steam engines with steam.
2. It developed the global trade.
Read and answer
Why do nearly all big cities locate on the coast or by rivers or lakes now?
Because cities need water for people’s homes, industry, business, tourism and leisure activities.
Read and answer
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.
靠近……
紧挨着
各种各样的
日常生活
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 spinning① 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.
事实上
在……末期
play a … role in 在……中起……作用
工业革命
多亏
结果
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, tourism② 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.
到2008为止
在海岸上
在河边或湖边
纵观历史
It is one’s duty to do 做……是……的责任
确保
浪费水
make a living 谋生
在发明农耕前，人们通过捕鱼或狩猎谋生。大约1.2万年前，人们开始种植庄稼，因此拥有好的水源变得非常重要。最终，人们开始使用水力来磨面，还建造了管道来运输水。
While-reading
Complete the sentences with the words and phrases below.
Change the form if necessary.
industry
global
As a result
Nearly
population
Post-reading
What are the advantages of living in the cities near rivers, lakes or the sea?
1. Rivers and seas provide fish and other seafood, which are healthy and tasty.
2. Boats and ships can carry goods and people, making travel and trade easier.
3. Swimming, fishing, and boating are fun ways to relax and enjoy nature.
Discussion 1
What are the disadvantages of living in the cities near rivers, lakes or the sea?
Water attracts mosquitoes and other bugs. Living near rivers or lakes means more bites or diseases like malaria.
Areas near the sea face hurricanes, tsunamis, or big waves. These can destroy buildings and put people in danger.
Water areas are often humid. This can make houses damp, cause mold, or make metal objects rust faster.
Discussion 1


1. Why is the Earth called “the blue
planet”?
2. What important role does the ocean
play in our lives?
3. How is the Earth different from other planets?
The Earth looks blue because most of the Earth’s surface is covered by water.
The ocean provides us with food, and makes it possible to transport goods all around the world.
The Earth is the only planet known to have bodies of water on it.
Watch and answer
1. Use less water at home.
2. Clean beaches or rivers with friends.
3. Tell others the importance of rivers and oceans.
4. Avoid buying products made from endangered sea animals.
Discussion 2
Nowadays, the ocean is facing many problems. What should we do to protect the ocean?
What should the government and organizations do to protect the ocean?
1. Enforce strict laws and regulations (法律法规) to stop pollution.
2. Set up “safe zones” in the ocean where fishing are not allowed.
3. Countries and organizations should share ideas and money to solve big problems like water pollution and overfishing.
Discussion 2
Cross-curricular connection
The water in our bodies
Watch and answer
What is the video about?
It mainly introduces the significance of water for living things and water in the human body.
What is the main idea of the passage?
Listen and think
Read and match the main idea with each paragraph .
Scan and match
Para 1
Para 2
Para 3
Para 4
Introduction to water in living things
Water percentage in humans
Water loss and
daily intake needs
Sweating and the risks of water loss
Read the passage and complete the notes.
about 70%—80%
about 60%
about 55%
1.5
0.5
Scan and fill
Read paragraph 1 and answer the questions.
The author mentions cucumbers and animals to show that water is an important part of all living things. By giving examples and percentages, the author helps the reader understand how much water different living things contain.
Skim and answer
1. What is the writing method of the first paragraph?
A. Asking questions
B. Using sayings
C. Giving examples
D. Telling stories
2. Why does the author mention cucumbers and animals in the first paragraph?
√
Read paragraph 2 and answer the questions.
Skim and answer
1. Fill in the blanks.
At birth, water makes up _______ to _______ percent of body weight. For adult men, it is about _______, while for adult women, it is around _______ percent.
2. According to the passage, which of the following is true about water percentage in the human body?
A It stays the same throughout life.
B It increases as we grow up.
C It is higher at birth than in adulthood.
D It is the same for men and women.
70
80
60
55
√
Read paragraph 3 and think.
Skim and answer
1. Explain the relationship between urine color and the body’s need for water. Why does the author include this detail?
Very yellow urine means the body does not have enough water. The author includes this detail to help people easily know when they need to drink more water.
2. Why is the total amount of urine and sweat different from the amount of water we drink?
Because the urine and sweat totals add up to about 2 litres, which is the lowest amount we need. The difference is because the body also loses water through breathing and other functions.
Read paragraph 4 and think.
Skim and answer
1. Put the following events in the correct order according to the passage:
a. The person feels ill.
b. The person loses more than 10% of body weight in water.
c. The person sweats during sport.
d. The person loses more than 5% of body weight in water and feels tired.
2. Imagine you are going for a two-hour hike on a hot day. What should you bring and why? Use information from the passage to support your answer.
I should bring a water bottle because hiking in hot weather will make me sweat a lot. If I lose too much water, I may feel tired or even ill. Drinking water helps me stay healthy and safe.
c → d → b → a
Further thinking
What else does the body use water for?
It keeps your mouth wet and washes away dirt on your eyes.
Water in our blood (血液) carries nutrients (营养物质) and oxygen (氧气) to cells throughout the body.
Further thinking
What else does the body use water for?
Water helps remove (排出) waste (废物) from the body through urine and sweat.
Water keeps joints (关节) lubricated (润滑) so they can move smoothly.
Write a composition
Write a short composition about the relationship between water and the human body.
Introduce water in the human body and explain why people need water.
List some bad drinking habits and the disadvantages.
Call on people to develop good drinking habits and keep their bodies healthy.
Share your composition
The Importance of Water to the Human Body
Water is like fuel for the human body. Our bodies cannot work properly without water. In fact, about 60% of our body weight is water. Without enough water, people may feel tired, get headaches, or even face serious health problems.
However, many people have bad drinking habits. Some wait until they feel thirsty to drink water. Others replace water with sugary drinks like soda or juice. To stay healthy, we should develop good drinking habits. First, drink enough water every day—6-8 glasses. Second, drink small amounts of water regularly instead of waiting until you’re thirsty. Third, choose clean water instead of sweet drinks. Take a water bottle with you or set alarms. These can help you develop good habits.
In conclusion, water is important to life. Let’s value this “invisible hero (隐形英雄)” in our bodies by drinking wisely. Start today, and your body will thank you with better energy and health!
Summary
What have we learned from this article?
Wits corner
Water is the driving force of all nature.
If there is magic on this planet, it is contained in water.
Homework
挑战层：制作「Water in Our Bodies」知识卡片 / 海报
内容包括：Water Facts（水知识）：从课文中提取 3-5 个关键数字信息（如人体含水量、每日需水量、失水规律等）；Healthy Tips（健康小贴士）
基础层：巩固练习
提高层：小组讨论，用课文知识解释原因
Why do we need to drink water every day?
Why do we sweat a lot when we do sports?
What will happen if we don’t drink enough water?
Thank you!

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