仁爱版九年级上册Unit 2 Saving the earth.Topic 3 SectionC课件(共17张PPT)

(共17张PPT)
Match the words with the pictures on Page 48 (1b).
A. acid rain B. nuclear energy C. biogas
A
C
B
酸雨
Fill in the blanks using but, and, though and while.
1. _____ it’s raining hard, he keeps on working outside.
2. Kangkang can solve the problem, ______ I can’t.
3. Mr. Lin is very kind _____ he is very humorous.
4. The suit fits me well _____ I can’t afford it.
Though
while
and
but
Unit 2 Saving the Earth
Topic 3 What can we do at home
to protect the environment
Section C
welcome
In Our Daily Lives
The ways to protect
the environment
and save energy
New sources of energy
Step 2 Lead-in
Match the pictures with the sentences.(2a)
Wind can produce electricity in many places.
2.People use sunlight to produce electricity.
3.Sea waves are used for producing electricity.
4.People use hot water or steam from deep in the earth to produce electricity and heat for factories, schools and homes.
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.
Choose the right picture for each paragraph.
Electric vehicle
Maglev train
biogas
Step 3 pre-reading
Electric vehicle
Maglev train
biogas
Choose the right picture for each paragraph.
paragraph 2
paragraph 3
Paragraph 4
A
B
C
Step 3 Fast reading
Task 1
Careful reading
Biogas Technology
1. China is one of the countries to use biogas.
2. Farmers recycle , and to make it.
straw
grass
animal waste
first
Item Advantage Disadvantage
biogas
renewable
The process requires a long time
and the cost is high.
Task 2
Electric Vehicles
1.On 11, 2010, a new kind of electric vehical named “Yezi”
was shown.
2. It produces electricity from the , the and .
April
sun
wind
CO2
Item Advantage Disadvantage
electric vehicles
It can not only
protect the environment
but also save energy.
It’s too small to hold many people.
Task 3
Maglev Trains
1.In China, the best-known maglev train is the -built one in Shanghai.
2. It can reach a top speed of km per hour.
3. There are no .
Item Advantage Disadvantage
maglev train
German
431
wheels
They’re quiet, quick and energy-efficient and don’t pollute the air.
Maglev guide paths are much more expensive than traditional steel railways.
Way to produce power Advantage Disadvantage
biogas
electric vehicle
maglev train
renewable
It can not only
protect the environment
but also save energy.
They’re quiet, quick and energy-efficient and don’t pollute the air.
It’s too small to hold many people.
Maglev guide paths are much more expensive than traditional steel railways.
Task 5：Careful reading
The process requires
a long time
and the cost is high.
Way to produce power Advantage Disadvantage
biogas
electric vehicle
maglev train
renewable
It can not only
protect the environment
but also save energy.
They’re quiet, quick and energy-efficient and don’t pollute the air.
It’s too small to hold many people.
Maglev guide paths are much more expensive than traditional steel railways.
Some countries use…to…, but it’s….
Some countries use…to…., but it can be ….
To solve the energy problem, people are… to ….
China is one of the….to…
Electric vehicles were developed …
The best-know maglev trains is …
The process requires
a long time
and the cost is high.
look for new ways
one of the first countries
people all over the world
in people’s everyday/daily lives
require
cost
in the 1990s
Shanghai World Expo
too…to…
in the near future
It takes sb sometime to do sth
reach a top speed
much more expensive (much/little修饰比较级)
use… to do
be used for doing/ to do sth
寻找新方法
首批国家之一
全世界的人
在人们的日常生活中
要求
代价/花费
在20世纪90年代
上海世博会
太…而不能…
在不久的将来
花费某人多长时间去做某事
达到最高时速
更贵得多
用……来做
被用作
Discuss in groups about the use, advantages
and disadvantages of the renewable energy.
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.
Step 6 Discussion
You can write like this !
Sunlight can produce a lot of energy. 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.
Example:
GOOD BYE !