Unit 13We're trying to save the earth Section A 3a-3b课件(共46张PPT)人教版九年级英语全册

(共46张PPT)
Unit 13
We're trying to save the earth!
Section A 3a--3b
industry
reusable
transportation
cruel
ecosystem
afford
take part in
fin
harmful
scientific
law
shark
chain
Review
Do you know the meaning of the words
What do you know about sharks
They live in the ocean.
They are the strongest and the most dangerous animal in the ocean.
Sharks are at the top of the food chain.
Pre-reading
the food chain
at the top of the food chain
Many people think that sharks are too strong
to be endangered, but they are wrong.
Save the sharks !
What’s the main idea of the article
A. Some kinds of fish in the ocean
B.The sharks are endangered in the world.
C.Shark’s fin soup is famous and expensive.
A:in great danger B:dangerous
Whole-reading
(Predicting)
Read the passage quickly.
What is the main idea of each paragraph
Please underline the key phrases or sentences.
Para. 1
Para. 2
Para. 3
Reason for killing sharks
Results of killing sharks
Action to stop killing sharks
阅读技能：skimming
While-reading (fast reading)
Read the passage and complete the fact sheet in 3a.(P99)
Where shark fin soup is popular
Number of sharks caught and traded every year
How much the numbers of some kinds of sharks have fallen in the last 20 to 30years
Two environmental groups which are against “finning”
in southern China
Para 1
around 70 million
Para 2
Para 2
over 90 percent
Para 3
WildAid and the WWF
while-reading
Is shark fin soup good for health
A Yes B. No C. No scientific(科学的) studies show that
2. Which part of China is shark fin soup popular
3. Sharks are ___________ of the food chain in ocean’s ecosystem.
A. at the bottom(底部) B. in the middle C. at the top
4. Every year, around ___________ sharks are killed and traded in the industry.
A. 50 million B.70 million C.90 million
5.Which one is not an environmental protection group
A. WWF B. WildAid C. WTO
D
A
C
B
√
√
√
√
√
Check your anwers
While-reading 中考链接
判断正误，正确的写“T”， 错误的写“F”，并改正。
This passage mainly introduces the shark fin.
The shark dish is especially popular in southern China and abroad.
Without a fin, a shark can also swim and never dies.
Sharks can never be endangered because they are the strongest
in their food chain.
5. We can read this passage in the scientific magazine.
阅读理解技能: skimming&scanning
主旨大意
细节理解
推断题
F
以偏概全
F
添油加醋
F
偷梁换柱
断章取义
F
文学常识
T
Many have heard of shark fin soup. (This famous and expensive dish is especially popular in southern China.) But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark fin soup
Save the Sharks!
Careful reading
Para 1
Shark fin soup ingredients 原料 price popular area harmful effect
shark fin
high
southern China
killing the
whole shark
people enjoy _____________________
fishermen ___________, ___________, then _______________________
________________________________decreased quickly
a bowl of shark fin soup
catch sharks
cut their fins
throw them into the ocean
The numbers of some kind of sharks
Task 3
Read Para. 2 and fill in the blanks.
For the sharks
cruel 残酷的
For the environment
Why
harmful 有害的
Why is it harmful to the environment
Sharks are _____________the food chain in the ocean's ecosystem.
If their _________ drop too low, it will_____________all ocean life.
at the top of
numbers
bring danger to
They have lived in the ocean for over 400 million years, even older than the dinosaurs.
Why will the decrease(减少) of sharks bring danger to all ocean life
70% of the oxygen(氧气) that we need to survive is provided by plankton(浮游生物) in the ocean. Once sharks become extinct(灭绝), other Marine life(海洋生物) without natural enemies will kill Marine plankton in large numbers, causing the earth to lose oxygen.
It will break the ecological balance(生态平衡）
Careful reading Para2g
The present situation(现状) of the sharks
70
90
20
30
Around 70 million sharks are caught and traded in this industry every year.
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
Sharks are endangered!
at the top of the food chain
catch ....cut off...
throw ...back into
enjoy
no longer swim,
slowly dies
cruel
around 70 million...
are caught and traded
bring danger to....
The number of sharks have
fallen....over 90%
Sharks are endangered!
1.What are the names of the two environmental protection groups
2. What have people done against(反对）finning？
Para3.
②Ask governments to develop laws to stop the sales of shark fins.
①teach the public about finning.
A.培养 B.壮大 C.完善
3. Do you think the shark fin soup is good for health
No scientific studies have shown that shark fins are good for health.
A.科学的 B.理论的
Careful-reading
So why eat them
Help save the sharks!
groups
government
people
Careful reading Para3g
The actions aganist killing
1.Never eat shark fin soup
2.Call on (号召) the people to protect the sharks.
3.Volunteer in the protection groups
4.Punish(惩罚) the people who kill the sharks...
g
Please return my ivory/horn(角)/home to me
Work in groups of elephants, polar bears and deer to tell people your situation from problems, reasons, influences and actions,your group will be invited to show in class. Some reference papers will be offered.
rules:
1.Great Teamwork(2’)
2.Good reasons(2’)
3.Good influences(2’)
4.Good actions(2’)
5.Good expressions(2’)
We need to work together to foster a community
of life for man and nature(构建人与自然共同体).
---Xi Jinping
Many have heard of shark fin soup. 很多人已经听说过鱼翅汤。
17. hear of sb. / sth. 听说某人 / 某事 (hear – heard - heard)
I’ve never heard of the place.
我从来没有听说过这个地方。
hear from sb. 收到某人的来信
填空：I’m looking forward to _____ _____ ______ as soon as possible. 我期望早日收到你的来信。
翻译: 当他听说这个坏消息时，他感到震惊。(shocked)
Language points
hearing from you
When he heard of the news, he felt shocked.
Language points
This is not only cruel, but also harmful to the environment.
这不仅很残忍，而且有害于坏境。
18. cruel adj. 残酷的；残忍的
be cruel to… 对…残忍 / 刻毒的
it’s cruel of sb. to do sth. 某人做某事残忍
I can’t stand people who are cruel to animals.
我不能容忍虐待动物的人。
It was cruel of him to kick the dog. 他踢狗真残忍。
翻译：她经常对她妹妹很刻薄。
She’s always cruel to his younger sister.
Language points
19. harmful adj. 有害的
be harmful to… 对…有害的
harm n[U]. 害处；危害 do harm to… 对…有害
harmless adj. 无害的
Staying up late often is harmful to your health.
经常熬夜有害你的健康。
Too much smoking does harm to his lung. 抽太多烟会对他的肺有害。
Reading in the sun ________ ________ _______ our eyes.
太阳下看书有害于我们的眼睛。
does harm to / is harmful to
Sharks are at the top of the food chain in the ocean’s ecosystem.
鲨鱼在海洋生态系统中处于食物链的顶端。
20. at the top of… ①在…顶部/顶端 ②用最高/最大的(速度声音等)
at the top of stairs 在楼梯顶上
at the top of one’s voice 高声地；扯着喉咙地
He stopped at the top of stairs.
He shouted at the top of his voice in order that he might be heard.
为了别人能够听见，他尽力大声叫喊。
填空：He suddenly cried out ____ ____ ___ ___ ___ ____.
他突然声嘶力竭地大叫。
at the top of his voice
Language points
21. drop v. ①下降 ②掉下 ③投递 ④放弃 ⑤中途卸客 n[C]. 滴
The temperature has dropped too low lately.
The bottle dropped and broke.
She dropped a postcard to her grandma.
Don’t drop English even if it’s hard for you.
Drop me here please. I will walk home.
I like my tea with just a drop of milk.
If their numbers drop too low, it will bring danger to all ocean life.
如果它们的数量降至过低，将会给所有海洋生物带来危险。
Language points
drop by 顺便拜访
drop in 顺便拜访(临时决定拜访)
drop out 退出比赛；退学
drop off 减少；下降
drop behind 落在…后面
If their numbers drop too low, it will bring danger to all ocean life.
如果它们的数量降至过低，将会给所有海洋生物带来危险。
--Mom, I’m out of shampoo. Can you get some for me after work
--Ok, I’ll _____ the supermarket on my way home.
drop by B. drop out
C. drop off D. drop behind
Language points
22. endangered adj. 濒临灭绝的
danger n. 危险
dangerous adj.危险的
be in danger 处于危险之中
be out of danger 脱离危险
bring danger to… 给…带来危险
Many believe that sharks can never be endangered because they are the strongest in their food chain.
许多人相信不会濒临灭绝，因为他们在他们的食物链中是最强的。
Language points
填空：
①We were relieved to hear that she ____ ____ ____ ____.
听说她脱险了，我们感到很欣慰。
②Children’s lives ____ ____ ____ every time they cross the road.
孩子每次过这条马路都面临着生命危险。
翻译：我们要努力保护濒危动物。(efforts)
was out of danger
are in danger
We should make efforts to protect endangered animals.
Language points
23. the number of… …的数量
修饰n[C].复数，修饰主语时谓语v.用单数
a (great) number of… 许多的…
修饰n[C].复数，修饰主语时谓语v.用复数
The number of girls in our class is 30.
我们班的女生数量是30。
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years. 在过去20-30年里，一些种类的鲨鱼数量已经下降了90%。
Language points
There ____ (be) a number of apples in the box, but the number of the red apples ____(be) only 10.
箱子里有大量的苹果，但是红苹果的数量仅仅是10 个。
are
is
填空：
Language points
24. fall v. ①(数量)下降；落下 ② 突然倒下 ③进入(某状态)
(fall – fell - fallen)
Prices continued to fall on the stock market today.
今天股票市场价格继续下跌。
One of the kid fell into the river.
其中一个小孩掉进了河里。
I fell over and cut my knee.
我摔倒了，划破了膝盖。
He had fallen asleep on the sofa.
他在沙发上睡着了。
Language points
24. fall v. ①(数量)下降；落下 ② 突然倒下 ③进入(某状态)
(fall – fell - fallen)
fall over… 被…绊倒
fall off (从…上)跌落；(数量)减少
fall down 倒塌；跌倒；失败
fall behind 落后于…
fall in love (with…) 相爱；爱上(…)
fall asleep / silent / ill 睡着 / 变安静 / 病倒
Language points
填空：The room had ______ ______.
整个房间都变得静悄悄的。
单选：--Why are they repairing the house
--Because the house too old and about to _____. It’s too dangerous.
A. fall over B. fall behind C. fall off D. fall down
fallen silent
Language points
25. by prep. 表示数量增减的幅度
House prices fell by over10%.
房价下跌超过10%
Their pay has increased by one-third.
他们的薪水涨了三分之一。
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years. 在过去20-30年里，一些种类的鲨鱼数量已经下降了90%。
Language points
by的其他用法：
①by doing sth. 通过做某事
I study by working with a group.
②经过（某人/某物）
He went by the supermarket on his way to school.
在去上学的路上，他经过那家超市。
③在…旁边，在…附近
Li Lei sits by my side in the classroom.
在教室里，李雷坐在我的旁边。
Language points
④在…之前，不迟于…
I can finish doing my homework by six o’clock.
我能在6点之前做完作业。
⑤乘（交通方式）
I usually go to school by bike.
⑥被…（用于被动语态）
He was knocked down by a car.
by的其他用法：
Language points
by the way 顺便问一下
by oneself 独自地
by accident = by chance 偶然地
by mistake 错误地
by hand 用手工
learn…by heart 记住…
by the end of 在…结束时
by the time… 到…为止
one by one 一个接一个
step by step 一步一步地
little by little 逐渐地
by and by 不久之后
by的短语：
Language points
①____ the end of holiday, I had spent all the money.
On　　 B. In　　 C. By　　 D. With
②Last Sunday, a group of pupils talked happily ___ a loud voice as they went to the countryside ____ bike.
A. by; by B.in; on C.in; by D. by; on
They have even asked governments to develop laws to stop the sale of shark fins. 他们甚至要求政府制定法律阻止鱼翅销售。
26. develop laws 制定法律
develop / form a habit of (doing) sth. 养成(做)某事的习惯
develop illness 患病
develop one’s career 发展某人的事业
development n. 发展
with the development of technology 随着科技的发展
翻译：她已经养成了早起的好习惯。
She has developed the good habit of getting up early.
law 的其他短语：
traffic laws 交通法规
make a law 制定一项法律
pass a law 通过一项法律
obey the law 遵守法律
break the law 违法
So far this year, more than 1,000 shops ____________(close) down.
今年至今为止，已经超过1000家商店停业了。
as far as I know 就我所知
be far away from 离...遥远
___ ___ ___ ___ ___, I’m the only one alive.
据我所知，我是唯一活着的。
So far, no scientific studies have shown that shark fins are good for health, so why eat them 至今为止，还没有科学研究表明，鱼翅是有益于健康的，所有为什么吃它们呢？
27. so far 迄今为止 = by now (都常与现在完成时连用)
have closed
As far as I know
Language points
28. against prep. ①反对 ②倚靠着 ③碰, 撞
④违背 ⑤逆着 ⑥和…比赛
I’m not against your ideas. Instead, I’m for you.
我不反对你的观点, 相反, 我支持你。
be against (doing) sth. 反对 (做)某事
be for (doing) sth. 支持 (做)某事
fight against / with… 与…斗争
against the low / one’s will 违背法律、某人的意愿
against the wind 逆着风
Two environmental groups against “finning”
反对“猎翅”行为的两个环保组织
He walked without looking ahead and hit his head against the tree.
他走路不看前方, 头撞到树上了。
We’re playing against the Lion next week.
She was leaning against the door.
She has been kept in the house against her will(意愿).
她被人强行关在屋子里。
He headed for the hospital against the wind.
他逆着风朝着医院前行。
28. against prep. ①反对 ②违背 ③倚靠着
④逆着 ⑤碰, 撞 ⑥和…比赛
下周我们要和雄狮队比赛。
她倚靠着门。
Exercises
一、 根据句意及汉语提示填写单词
1. No one is _________(反对) him.
2. Keeping the animals in the zoo is very _______(残酷的).
3. _________(鲨鱼) are very smart animals.
4. Our government has made ______(法律) to stop driving after drinking.
5. In our class, fifty _________(百分之) of students go to school by bike.
against
cruel
Sharks
laws
percent
Exercises
二、根据句意，用括号中所给词的适当形式填空
1. Hainan is in the _________ (south) part of China.
2. We all support his _________ (science) research.
3. This is an ___________(danger) animal. We should try to save it.
4. Smoking is _________(harm)to your health. You must give it up.
5. At present, the number of many animals ____________(drop).

southern
scientific
endangered
harmful
is dropping
Exercises
三、 根据汉语意思完成句子，每空一词
1. 你听说过那位女歌手吗？
Do you _____ _____ that woman singer
2. 他不但会弹钢琴，而且他也会弹小提琴。
Not only ____ ____ _____the guitar, but also play the violin.
3. 中午时刻，我们到达山顶。
At noon, we arrived ____ ____ ____ _____ mountain.
4. 到目前为止，我们已经卖出了那些书的一半。
_____ _____, we have sold out half of those books.
hear of
can he play
at the top of
So far