(共53张PPT)
Unit 6 Earth first
Period 5 Developing ideas
What's really green
At the end of the class, you'll be able to:
distinguish some real green living truths from false ones;
analyze the logic of causes-effects-measures in the context of a green lifestyle;
put what you’ve learnt today into daily practice to live a real green life.
Learning objectives
Chect out
Quiz time!
How much do you know about a green lifestyle
Look at the questions about “green living” and tick your answers.
Which shopping bag is more environmentally friendly
A plastic bag.
A paper bag.
Neither of these.
Look at the questions about “green living” and tick your answers.
2. What should you do to save energy when leaving your home
Turn off a device.
Unplug a device.
Neither of these.
Look at the questions about “green living” and tick your answers.
3. What food is better for the environment
Food produced near to where you live.
Food produced far from where you live.
It depends.
Look at the questions about “green living” and tick your answers.
4. Which uses less water
Taking a bath.
Taking a shower.
It depends.
Think & Predict
What's green
What's really green
Look at the two titles and think out the differences between them and WHY the author uses “What's really green” instead of “What's green”.
Paper shopping bags are better than plastic ones.
When you turn off a device, it stops using power.
Eating local food is good for the environment in terms of carbon footprint.
It’s better to take a shower than a bath to save water.
Think & Predict
subheadings
Read & Decide
Read the subheadings in the passage and decide if they are true or false.
expand on: to add details to what you are saying
Expand on the main heading
Slightly longer than the main heading
Give the reader an overall understanding of the text
What's really green
Paper shopping bags are better than plastic ones.
When you turn off a device, it stops using power.
Eating local food is good for the environment in terms of carbon footprint.
It’s better to take a shower than a bath to save water.
It takes hundreds of years for plastic to break down,but much less time for paper.
When we turn off a device, it goes into stand-by mode.
Local food does not need to be transported long distances and kept cool during transport.
Taking a shower uses less water than a bath.
Why do people believe these statements are true
Read & Think
Read the passage, check your answers and then figure out Why do people believe these statements are true
Read the effects and complete the causes of these according to the passage.
CAUSES
EFFECTS
1. Making a paper bag uses more energy and water than making a plastic bag. It also produces more greenhouse gases.
Paper bags are not good for the environment.
2. Devices turned off go into stand-by mode and still use power.
Turning off a device won't stop it from using power.
3. Local produce sometimes might use more energy and produce more greenhouse gases than produce grown a long way away--even taking into account its transport.
Eating local food isn't always better for the environment.
CAUSES
EFFECTS
adj. 备用的
把……考虑进去
4. If you spend more than eight minutes in a shower, you'll use as much water as in a bath--about 50 litres of water.
CAUSES
EFFECTS
It's not always better to take a shower than a bath.
n. 升,公升
Take a reusable bag with you when you go shopping.
To make sure the appliance
is in fact off, remove the
plug from its power supply
Eating local food isn't always better for the environment.
Keep your shower time as short as possible.
Read & Reflect
How much do you know about a green lifestyle, after reading the text
Introduction
Body
Conclusion
Green truth 1
Green truth 2
Green truth 3
Green truth 4
Figure out the structure of the passage.
Introduction
Conclusion
Read & Summarize
Paper bags are not good for the environment.
Turning off a device won’ t stop it from using power.
Eating local food isn’ t always better for the environment.
It’s not always better to take a shower than a bath.
Which of the “green truth” surprises you most
Give your reasons.
Q1
Think & Share
Are you aware of any other “green truths” that are not true Share them with the class.
Q2
How “green” are you Share your “green actions” with the class.
Q3
Carpooling is not as green as it is claimed to be. In most cases, this is worse than taking private cars because they have to rush back and forth between carpoolers, which actually increase the mileage.
Retell the passage based on four subheadings and some key words.
Green truth 1
time to break down; usages of energy and water; produce greenhouse gases
Paper shopping bags are better than plastic ones.
Green truth 2
stand-by mode; electricity continues to leak; remove the plug
When you turn off a device, it stops using power.
Green truth 3
transported long distances; kept cold; production of the food; energy and greenhouse gases
Eating local food is good for the environment.
Green truth 4
shower time; bath size; eight minutes; 50 litres
It's better to take a shower than a bath.
Retell & Review
Take actions now!
What can we do to become “greener” or become really green, not just green
Think & Share
Changing Your Personal Habits
Carry a reusable water bottle so you will not need bottled water.
Use reusable bags while you’re shopping.
Reuse items to save them from the landfill.
Reduce the amount of time you spend using electronics(电子产品).
Buy second-hand products or borrow items instead of buying them new.
Turn lights off when they aren’t in use
Creating a Green Home
Cut down on your water use.
Line dry your clothing instead of using a dryer.
Eat less meat because it takes more resources to raise.
Recycle paper, cardboard, plastic, glass, and metal cans.
Staying Green on the Move
Walk or ride a bike to some places if you live close enough.
Use public transportation to travel long distances.
1
2
Some tips!
1 Use these questions to help plan your talk.
Which “green truth” are you going to talk about
Why do people believe it is “green”
Why is it not completely true
What can you do to become “greener”
2 Organise your talk following the steps below.
Start your talk by stating the topic.
Describe your chosen “green truth” in more detail.
Explain why it is not completely true.
End your talk by encouraging your audience to become “greener”.
Topic: Are electric cars really “green”
Description: Electric cars run on electricity and they don’t burn gasoline at all; therefore they don’t emit CO2, thus creating “zero emission” (零排放).
For example:
Explanation: Although driving an electric car does not cause any air pollution, the pollution mainly comes from the production of its battery and the electricity used to keep it running. The production of the electric batteries requires lithium(锂). A large amount of energy is used on mining and processing this metal. Meanwhile, the electricity by which electric cars are powered is mainly from burning coal or gas. All of these contribute to carbon emissions. Consequently, electric cars aren’t really green.
We only have one planet.
Let’s take care of it.
1. It takes hundreds of years for plastic to break down, but much less time for paper.
break down: if a substance breaks down or is broken down into parts, it separates into the parts that it is made up of 分解,分化
eg After many years, rocks break down into dirt.
Food is broken down in the stomach.
Language points
break down还意为:
The plan was good, but it broke down, because people were unwilling to cooperate.
We are sorry to arrive late, but the car broke down.
Your health will break down if you work too hard.
The young woman broke down in tears.
(计划、谈判等)失败
(机器、车辆等)坏了
(身体)垮了
感情失控(痛哭起来)
【语境应用】翻译句子。
1) 电梯坏了,我们不得不走楼梯。
The lift breaks down, so we have to walk up the stairs.
2) 他听到这个消息时不禁痛哭起来。
He breaks down when he hears the news.
2. However, making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water.
动名词短语making a paper bag作主语,谓语动词用单数形式。
倍数表达法,结构为:倍数+as much+不可数名词+as+其他
常见的倍数表达法:
A+be+倍数+as+形容词/副词原级+as+B
A+be+倍数+形容词/副词比较级+ than+B
A+be+倍数+the+名词(size/ weight/length)+of+B
A+倍数+what从句
倍数的一种表示法
eg When you study the local map, you will find this town is three times as big as that one.
=When you study the local map, you will find this town is three times bigger than that one.
=When you study the local map, you will find this town is three times the size of that one.
【语境应用】单项选择。
1) Peter’s jacket looked just the same as Jack’s, but it cost
______ his.
A. as much twice as B. twice as much as
C. much as twice as D. as twice much as
2) Ten years ago the population of our village was ______ that of theirs.
A. as twice large as B. twice as large as
C. twice as much as D. as twice much as
B
B
amount v. if figures, sums etc amount to a particular total, they equal that total when they are added together 总计,共达
(常与介词to搭配)
eg Time lost through illness amounted to 1,357 working days.
因疾病而损失的时间总计为 1357 个工作日。
amount n. a quantity of something such as time, money, or a substance 数量,数额
eg They spend equal amounts of time in California and New York.
他们在加利福尼亚和纽约呆同样长的时间。
amount
a large / considerate / enormous / huge /... amount of
大量的,许多 (修饰不可数名词,谓语动词常用单数形式)
amounts of 大量的,许多 (修饰不可数名词,谓语动词
常用复数形式 )
表示“许
多,大量”
可数
不可数
a great / good many, a great / large /
good number of, (quite) a few等。
(quite) a little, a great deal of, a large
amount of, large amounts of等。
plenty of, a lot of, lots of, a mass of,
masses of 等, 这时谓语动词的单复数形式
取决于它们后面所接名词的形式。
可数名词
复数/不可
数名词
【语境应用】单句语法填空。
1) A large amount of damage ___________ (do) in a very short time.
2) Large amounts of money ___________ (spend) on the freeway every year.
3) There _______ (be) a huge amount of information on the Internet.
was done
are spent
is
写准核心单词。
4) Today $8 or $10 seems a small ________ (数量) of money, but at that time these amounts were forbidding to most citizens.
amount
3. To make sure your appliance is in fact off, remove the plug from its power supply.
remove v.
①to take something away from, out of, or off the place where it is 移走;
搬走; 去掉
eg Remove the old wallpaper and fill any holes in the walls.
②to get rid of something so that it does not exist any longer 清除,除去
eg This treatment removes the most stubborn stains.
③dismiss from a job or office 免职,解雇
eg Congress could remove the President from office.
④to take off a piece of clothing 摘掉; 脱掉
eg He removed his hat and gloves.
【归纳】
remove...from… 把……从……移开
remove sb. from school 开除; 勒令某人退学
remove one’s doubt/ trouble 消除某人的疑虑/烦恼
【语境应用】写出下列句中remove的含义。
1) If a nest has four eggs and you remove one, the bird will not notice.
2) He removed his jacket when he arrived home.
3) He was severely criticized and removed from his post.
4) The agreement removes the last serious obstacle to the signing of the treaty.
5) Three children were removed from the school for bad behaviors.
消除
拿走
撤职
脱掉
开除
move, transfer, remove
这些动词均可表从一处移往另一处之意。
move: 普通用词, 指从一处到另一处转移。
transfer: 一般表示转送/移交或迁移, 尤指交通运输中的换乘或职务的调动等。
remove: 移动, 与move可换用, 还可指撤职或开除学籍等。
4. In some cases, local produce might have used more energy and produced more greenhouse gases than produce grown a long way away — even taking into account its transport.
produce v. to make things to be sold, especially in large quantities 生产;制造
to grow or make something as part of a natural process; to have a baby or young animal 生长;出产
eg Their factory produces 500 bikes a day.
The tree produces much fruit each year.
produce u.n. things that have been made or grown, especially things connected with farming 农产品
eg They provide us with fresh produce every day.
produce, product与production
produce u.n. 农产品
product c.n. 产品,制品
production u.n. 生产行为,产量
【语境应用】 用produce, product, production的适当形式填空。
1) We must ________ more food for ourselves and import less.
2) Farmers brought their ________ to town early each Saturday morning.
3) The river has been polluted by waste ________ from the factory.
4) We will encourage the ___________ of excellent cultural works.
produce
produce
products
production
take … into account: to consider or include particular facts or details when making a decision or judgment about something 把……考虑进去
eg She seemed not to take the rising oil prices into account when buying a car.
on account of 由于; 因为
on no account 决不(置于句首时,句子用部分倒装)
account for 说明(原因等);(作出)解释; 占……(比例)
take的短语
take a risk 冒险 take a chance 冒险,碰运气
take advantage of 对……加以利用
take away 拿走,带走 take down 记下,写下
take in 吸收,欺骗,理解 take measures 采取措施
take off 成功,成名,脱掉(衣服),(飞机)起飞
take on 承担 take over 接管
take part in 参加 take place 发生
take pride in 感到自豪 take up占去,着手做
【语境应用】翻译下列句子。
1) 老师会考虑学生们的请求。
2) 当我们遇到重要的问题时,我们应该考虑一下父母的建议。
3) 你怎么解释这次事故呢?
How do you account for the accident
The teacher would take into account the request of the students.
When we meet important problems, we should take account of
our parents’ advice.
Prepare for another talk about a “green truth” that is not true. Use the Internet or the library to help you.
Homework
1. Can you retell the five “green truths” in the passage What are the causes of these truths
2. Can you think of other “green truths” in our daily life
3. What can you do to become “greener”
Self-evaluation
Discover more green truths that are not completely true and explain these ideas by using the causes-effects-measures.
Homework