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(共30张PPT)
Unit 2 Topic 3
What can we do at home to protect the environment
Section C
Learning objectives
1. Some words:
technology, wheel, steel, require, German, guide , deep
2.Some phrases: run out
3.Some sentences:
(1)In many countries, people produce power from coal, but it is very dirty and causes acid rain.
(2)They will never run out so they are called renewable sources.
4.Talk about the advantages and disadvantages of some kinds of energy.
Review
What should you do if you would like to be a greener person
Turn off the lights when we leave a room.
Walk or ride a bike instead of taking a bus or a taxi.
Take a cloth bag when we go shopping.
Don’t drive a car if you travel a short distance.
Write on both sides of the paper.
Don’t use the things that can be used only once.
After we wash faces, we can use the water to wash clothes.
Turn off the TV set while we are away.
…
New words
New words
New words
New words
New words
Free talk
Look at the pictures.Do you know what they are
Free talk
Look at the pictures.Do you know what they are
electric (adj.) — electricity (n.)
It’s an electric car. It works well, but it’s slow and can’t run for long.
[ lektr k]
Free talk
Look at the pictures.Do you know what they are
It’s a maglev train. Its advantages are quiet, fast and clean, but it’s too expensive.
磁悬浮列车
Free talk
Look at the pictures.Do you know what they are
China is one of the first countries in the world to use biogas technology .
沼气
n.技术
Work on 1a
Read 1a and choose the right picture for each paragraph.
paragraph 2
paragraph 3
Paragraph 4
Work on 1b
Read 1a and match the words with the pictures on Page 48.
A. acid rain B. nuclear energy C. biogas
A
C
B
Watch and understand
Paragraph 1
( ) It’s good that people produce power from coal.
( ) Nuclear power is dangerous. So we can’t use it.
( ) To solve the energy problem, people all over the world are looking for new ways to produce power.
Read Paragraph 1, and then mark True (T) or False (F).
T
F
T
Paragraph 2
Read Paragraph 2, and finish the table
Item
Advantage
Disadvantage
renewable
long process and high cost for its building
biogas
Paragraph 3
Read Paragraph 3, and finish the table
Item
Advantage
Disadvantage
save energy,no pollution
too small to hold many people
electric vehicle
Paragraph 4
Read Paragraph 4, and finish the table
Item
Advantage
Disadvantage
quiet, quick, energy-efficient, no pollution
much more expensive than traditional steel railways
maglev train
Read 1a and find out some language points
In many countries,people produce power from coal,but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power. However，nuclear power can be very dangerous. To solve the energy problem,people all over the world are looking for new ways to produce power.
China is one of the first countries in the world to use biogas technology. Farmers recycle straw， grass and animal waste to make biogas. This renewable energy is used in people’s everyday lives. Its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high.
Electric vehicles were developed in the 1990s. On April 11,2010,a new kind of electric vehicle named“Yezi” was shown in the 2010 Shanghai World Expo. It produces electricity from the sun， the wind and CO. It can not only protect the environment but also save enerey. It's too small tohold many people，but larger models will be developed in the near future.
In China,the best-known maglev train is the German-built one in shanghai. It takes people just 7 minutes to go to the airport 30km away. The train can reach a top speed of 431 km per hour. It is quiet and quick. There is no wheel noise,because there are no wheels. Maglev trains are very energy-efficient and do not pollute the air.However,maglev guide paths are much more expensive than
tradiriondl steel railways.
Language points
In many countries,people produce power from coal,but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power. However，nuclear power can be very dangerous. To solve the energy problem,people all over the world are looking for new ways to produce power.
China is one of the first countries in the world to use biogas technology. Farmers recycle straw， grass and animal waste to make biogas.
use sth. to do sth. 使用某物做某事 nuclear energy 核能
然而
危险的
全世界
look for 寻找
one of +可数名词复数 ....之一
生物技术
Language points
This renewable energy is used in people’s everyday lives. Its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high.
Electric vehicles were developed in the 1990s. On April 11,2010,a new kind of electric vehicle named“Yezi” was shown in the 2010 Shanghai World Expo. It produces electricity from the sun， the wind and CO. It can not only protect the environment but also save enerey. It's too small to hold many
in+the +年份s 在几世纪几十年代
be done 被动语态
not only...but also 不但...而且
too+adj. to do sth. 太...而不能做某事
Language points
people，but larger models will be developed in the near future.
In China,the best-known maglev train is the German-built one in shanghai. It takes people just 7 minutes to go to the airport 30km away. The train can reach a top speed of 431 km per hour. It is quiet and quick. There is no wheel noise,because there are no wheels. Maglev trains are very energy-efficient and do not pollute the air.However,maglev guide paths are much more expensive than tradiriondl steel railways.
will be done 将来时的被动语态
It takes sb. st. to do sth. 花费某人多长时间做某事
节能
Read and remember
use sth. to do sth. 使用某物做某事
nuclear energy 核能
all over the world 全世界
look for 寻找
biogas technology 生物技术
not only...but also 不但...而且
too+adj. to do sth. 太...而不能做某事
It takes sb. st. to do sth. 花费某人多长时间做某事
energy-efficient 节能
Match the phrases
use sth. to do sth.
nuclear energy
all over the world
look for
biogas technology
not only...but also
too+adj. to do sth.
It takes sb. st. to do sth.
energy-efficient
使用某物做某事
全世界
寻找
节能
花费某人多长时间做某事
生物技术
不但...而且
太...而不能做某事
核能
Work on 2a
Read the passage below and match the pictures with the sentences. Then discuss in detail the use of one energy source.
The sun, wind, waves and heat from deep in the earth are energy sources. They will never run out so they are called renewable sources. In 2011, about 16% of energy used worldwide came from renewable sources. The use of it is increasing rapidly each year.
deep adj.深的，厚的 adv.深深地， 在深处
run out 用完，耗尽
E.g. He has run out of food, so his children are hungry.
Work on 2a
Read the passage below and match the pictures with the sentences. Then discuss in detail the use of one energy source.
Wind can produce electricity in many places.
People use sunlight to produce electricity.
Sea waves are used for producing electricity.
People use hot water or steam from deep in the earth to produce electricity and heat for factories, schools and homes.
Work on 2b
Take notes on your discussion and write a passage with them.
You may begin like this:
Sunlight can produce a lot of energy. People began to use the energy from the sunlight in different ways many years ago…
Example
Sunlight can produce a lot of energy. People began to use the energy from the sunlight in different ways many years ago. We can use it to warm the house in the winter, to heat the water for baths, and to produce electricity. What’s more, we can even use it to run vehicles directly in the near future.
As is known to us, the energy from the sunlight has a lot of advantages. For example, it is clean, renewable and non-polluting. Besides, it does no harm to our nature. So we’d better use it as much as possible.
THANK YOU

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