(共30张PPT)
Unit 2 Saving the Earth
Topic 3 What can we do at home
to protect the environment?
Section C
学习目标： 1. 掌握四会词：acid, nuclear, biogas, technology, straw, renewable, disadvantage , process, require, maglev, German, wheel, guide, steel, sunlight, steam, , electric, best-know, per, efficient, path, wave, deep ,source, worldwide, run out. 2. 综合复习所学环保词汇用法及表达自我观点与建议的句型。 3. 了解现代科学技术在环境保护方面的作用。
acid rain 酸雨
nuclear adj.原子能的;核动力的 [?nju?kl??]
biogas n.沼气
technology n.技术 [tek?n?l?d?i]
straw n.禾杆，稻草 [str??]
renewable adj.可更新的,可再生的
disadvantage n.不利因素;障碍 [d?s?d?vɑ?nt?d?]
process n.步骤,过程v.加工,处理 [?pr??ses]
require v.需要;要求 [r??kwa??]
best-known 最知名的
maglev train 磁悬浮列车
German n.德国人;德语 [?d???m?n]
per prep.每，每一 [p?]
wheel n.轮，车轮，轮子 [hwi?l]
guide n.向导，导游；指南，手册 [ga?d]
path n.道路;途径 [pɑ?θ]
steal n.钢，钢铁 [st??l]
wave n.挥手;海浪v.招手;摆手 [we?v]
deep adj.深的adv.深深地 [di?p]
use up 用完,耗尽
worldwide adv.全世界,世界各地 [?w??ldwa?d/ ]
steam n.水蒸气,蒸汽;水汽 [sti?m]
remove v.去除,使消失;移开 [r??mu?v]
replace v.代替,取代 [r??ple?s]
dry adj.干燥的v.弄干 [dra?]
insect n.昆虫 [??nsekt]
bite v.咬;叮 [ba?t]
planter n.种植园主 ['plɑ:nt?]
Are you a greener person?
How can we become 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.
…
It’s an electric car. It works well, but it’s slow and can’t run for long.
electric (adj.) — electricity (n.)
Do you know them?
Do you know it ?
It’s a maglev train. Its advantages are quiet, fast and clean, but it’s too expensive.
磁悬浮列车
n.技术
Do you know it ?
China is one of the first countries in the world to use biogas technology .
沼气
1a Read and understand.
Look at the pictures. Do you know what they are? Choose the right picture for each paragraph.
paragraph 2
paragraph 3
Paragraph 4
1b Read 1a and match the words with the pictures on Page 48.
A. acid rain B. nuclear energy C. biogas
A
C
B
adj.原子核的，
原子能的
酸雨
Read Paragraph 1 again, and then mark True (T) or False (F).
( ) 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.
T
F
T
Paragraph 1
Paragraph 2
Its key disadvantage is that the process requires a long time (up to 30 days )and the cost is high.它最大的缺陷是生产过程需要很长时间（长达30天）和成本高。
process n.步骤，过程 v.加工，处理
require v.需要，需求
require 有两种用法：
*require (doing) sth. 表示主语“该...了”。
如： The floor requires washing. 地板该洗了。
*be required to do sth.表示主语必须（被要求）...
如:Students are required to attend classes.
学生必须按规定上课。
Paragraph 3
Electric vehicles were __________ in the 1990s. On April 11, 2010, a new kind of electric vehicle _______ “Yezi” was shown in the 2010 Shanghai World Expo. It produces _________ from the sun, the wind and CO2. It can not only protect the environment but also _____ energy. It’s too small to hold many people, but _______ models will be developed in the near future.
develop, electric, name, save, large
developed
named
electricity
save
larger
Paragraph 4
1.去30公里以外的飞机场只需花费人们七分钟的时间。
It takes people just 7 minutes to go to the airport 30 km away.
2.火车最高时速能够达到每小时431公里。
The train can reach a top speed of 431 km per hour.
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
1a Read and understand.
coal--- dirty, acid
nuclear energy --- dangerous
electric vehicles --- the sun, the wind andCO2---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
Retell 1a
German
n.德国人，德语
Germany n. 德国
pl. Germans
wheel n. 轮， 车轮， 轮子
E.g. They are Germans, and they are from Germany.
language points
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.
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.
阳光，日光
水蒸汽，蒸汽，水汽
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:
We learn: 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.
We can: Talk about the advantages and disadvantages of some kinds of energy.
Summary
Assignment
Read 1a.
Memorize the useful expressions and key sentences which we learn today.
Finish Section C in your workbook.
Review Section A-C.
Thank you!
谢谢
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2019-2020仁爱科普英语九年级上
Unit2topic3sectionC导学案
学习目标：
1. 掌握四会词：acid, nuclear, biogas, technology, straw, renewable, disadvantage , process, require, maglev, German, wheel, guide, steel, sunlight, steam, , electric, best-know, per, efficient, path, wave, deep ,source, worldwide, run out.
2. 综合复习所学环保词汇用法及表达自我观点与建议的句型。
3. 了解现代科学技术在环境保护方面的作用。
学习重点：1.环保词汇的用法及表达自我观点与建议的句子。
2. 本节的短语和词组。
学习难点：.环保词汇的用法及表达自我观点与建议的句子。
一．选择选一选。
( ) 1.Two ______are talking with two_______ in English.
A. Germen; Japanese B. Germans; Japan
C. German; Japan D. Germans; Japanese
( ) 2.—How many cars _______in the factory every month?
—About 2000.
A. produce B. produced C. produces D. are produced
( ) 3._____of the land in that area ______covered with trees and grass.
A. Two fifths; is B. Two fifth; are
C. Two fifth; is D. Two fifths; are
( ) 4.—________ How long haven’t you cleaned your room?
—Two months at least
—No wonder(难怪)it’s so untidy.
What a mess! B. What a shame!
C. What bad weather! D. What a bad experience!
( ) 5.Could you tell me how long _____the football club?
A. you have joined B. have you joined
C. you have been in D. have you been in
二．单词填一填
根据提示填上适当的单词完成句子。
1.We are all in (同意) on that point.?
2.He n his head as if to say yes.?
3.There were many (德国人) visiting our school last week.?
4.We hire a (导游) to show us around the city.?
5.The paint is not (干的) yet.?
三．遣词造句
1.China,population___________________________________________________
2.pollution,health____________________________________________________
3.aim, poor children_________________________________________________
4.see,oneself_______________________________________________________
5.have,ever________________________________________________________
?
参考答案
一．选择选一选。
1—5DDAAC
二．单词填一填
1.agreement 2.nodded 3.Germans
4.guide 5.dry
三．遣词造句
1.China has the largest population in the world.
2.Air pollution is harmful to our health.
3.Project Hope aims to help poor children.
4.I want to see New York myself.
5.Have you ever danced?
【解析】此题考查语句的表达陈述能力。
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