Unit 2 Topic 3 What can we do to protect the environment?Section C 课件 (共27张PPT，内嵌音视频)2024-2025学年英语仁

(共27张PPT)
Unit 2
Saving the Earth
Topic 3
Section C
1.学习目标
3.重点探究
2.自主学习
学习导航
5.当堂检测
6.课堂总结
4.拓展提升
新课导入
Let’ learn renewable energy.
学习目标
1. 能熟悉并正确运用本课时的重点单词和短语
2. 能通过阅读文章，了解现代科学技术在环境
保护方面的作用
自主学习
New words
acid rain 酸雨
nuclear adj. 原子能的；核动力的
biogas n. 沼气
technology n. 技术
straw n. 禾杆，稻草
renewable adj. 可更新的，可再生的
disadvantage n. 不利因素；障碍
process n. 步骤，过程 v. 加工，处理
require v. 需要；要求
electric adj. 用电的；电动的
best-known 最知名的
maglev train 磁悬浮列车
German n. 德国人；德语
per prep. 每，每一
wheel n. 轮，车轮，轮子
efficient adj. 效率高的
guide n. 向导，导游；指南，手册
path n. 道路；途径
steel n. 钢，钢铁
wave n. 挥手；海浪 v. 招手;摆手
deep adj. 深的 adv. 深深地
sourse n. 来源，出处；起源；源头
run out 用完，耗尽
worldwide adv. 全世界，世界各地
sunlight n. 阳光，日光
steam n. 水蒸气，蒸汽；水汽
重点探究
Wind is used for producing electricity in many places.
Look at the following pictures and guess the meaning of the underlined word.
electric(adj)+ ity(名词后缀)=electricity(n)
Nuclear power is clean but it is very dangerous.
…people produce power from coal, but it is very dirty and causes acid rain.
1a Read and understand.
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 CO2. It can not only protect the environment but also save energy. It’s too small to hold 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 30 km 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 traditional steel railways.
Look at the pictures. Do you know what they are Choose the right picture for each paragraph.
paragraph 2
paragraph 3
Paragraph 4
Read the passage, and then mark True (T) or False (F).
( ) 1. It’s good that people produce power from coal.
( ) 2. Nuclear power is dangerous. So we can’t use it.
( ) 3. To solve the energy problem, people all over the world
are looking for new ways to produce power.
( ) 4. Electric vehicles were developed in the 1999s.
T
F
T
F
1b Read 1a and match the words with the pictures on Page 48.
A. acid rain B. nuclear energy C. biogas
A
C
B
( )
( )
( )
1c Read 1a again and complete the table.
Item Advantage Disadvantage
biogas
electric vehicle
maglev train
renewable
long process and high cost for its building
save energy,
no pollution
too small to hold many people
quiet, quick, energy-efficient, no pollution
much more expensive than traditional steel railways
Watch the video about 1a then retell.
Retell
coal--- dirty, acid
nuclear energy --- dangerous
electric vehicles --- the sun, the wind and CO2---protect the environment, save energy, small
maglev train ---German-built, quiet, quick, no wheel noise, energy-efficient, not pollute the air
biogas technology – straw, grass and animal waste, everyday lives, require, the high cost
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.
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.
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…
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.
You can write it like this:
拓展提升
Language points
1. It’s too small to hold many people,but the larger models will
be developed in the near future.它太小不能承载太多的人，但在不久的将来，更大的车型将会被研制出来。
①　hold v. 容纳，包含；
eg: The plane holds about 300 passengers.这架飞机可容纳大约300名乘客。
②　hold v. 拿着，抓住，抱住；
eg: He was holding the baby in his arms. 他抱着婴儿。
③　hold v. 召开，举行，进行（比赛，会议等）；
eg: The Olympic Games are held every four years. 奥运会每四年举行一次。
④　hold v. (打电话时）等待，不挂断；
eg: Hold on, please! 请稍等。
2. The train can reach a top speed of 431 km per hour.
这辆火车最高速度能达到431公里每小时。
reach a speed of+具体速度 ——达到某个速度
拓展：at a speed of + 具体速度——以某个速度, 可用high, low, full等形容词修饰speed 。
eg: Beijing-Tianjin train reaches a speed of 300 km per hour.
北京至天津线火车时速达到每小时300千米。
3. People use sunlight to produce electricity.
人们用太阳光发电。
① use sth. to do sth. 用某物做某事；
eg: People use wood to make paper. 人们用木材造纸。
② be used for doing sth./to do sth. 被用来做某事；
eg: Wood is used to make paper. = Wood is used for making paper.
木材被用来造纸。
③ be/get used to doing sth. 习惯（做）某事；
eg: I am used to living here. 我习惯住在这里。
④ used to do sth. 过去常常做某事；
eg: Mr. White used to smoke. 怀特先生过去常常吸烟。
look for new ways
in the 1990s
one of the first countries
people all over the world
in people’s everyday/daily lives
in the near future
reach a top speed
much more expensive
use… to do
be used for doing/ to do sth.
1. 寻找新方法
2. 在20世纪90年代
3. 首批国家之一
4. 全世界的人
5. 在人们的日常生活中
6. 在不久的将来
7. 达到最高时速
8. 更贵得多
9. 用……来做
10. 被用作
Key phrases
句型转换。
1. Watching TV too much is bad for your eyes. (用good改写为选择疑问句)
_____ watching TV too much _____ _____ ______ for your eyes
2. Something is wrong with the TV set. (用there be句型改写句子)
______ _____ ___________ ________ ______ the TV set.
3. Maths is important. English is important, too. (用as…as连成一个句子)
Maths ______ _____ important ______ English.
4. They are good at singing. They are good at dancing. (用not only…but also
改写为简单句)
They _____ ______ _____ good at singing ______ ______ good at dancing.
当堂检测
Is bad or good
There is something wrong with
is as as
are not only but also
课堂总结
Unit 2
Topic 3 Section C
重点单词短语：
hold；reach a speed of；
use sth. to do sth./ use sth. for doing.
了解现代科学技术在环境保护方面的作用