Unit 13 We’re trying to save the earth! Section A2 (3a-3b)优学案（含答案）

Unit 13 We’re trying to save the earth!
Section A2 (3a-3b)
【学习目标】
1．学习并掌握新词汇：shark，fin, cruel, harmful，chain，ecosystem，low，industry，law, scientific
2．学会并正确使用以下常用表达：
hear of，cut off，throw…into，no longer，not only…but also，be harmful to，at the top of…，the sale of…
3. 通过学习3a部分的文章，了解鲨鱼的生存现状，树立保护濒危动植物的意识。
【重点和难点】
了解鲨鱼的生存现状，掌握文章中的重点。
【课前预习】
一. 根据中文意思写出下列重点单词。
1. 鲨鱼n. ____
2. (鱼) 鳍n. ____
3. 科学上的；科学的adj. ____
4. 残酷的；残忍的adj. ____
5. 有害的adj. ____
6. 链子；链条n. ____
7. 生态系统n. ____
8. 工业；行业n. ____
9. 法律；法规n. ____
二. 认真阅读课文，找出下列重点短语。
10. 鱼翅汤 _________
11. 处于食物链的顶端 _________
12. 在过去的20到30年间 _________
13. 环境保护组织 ________
14. 健全法律 _________
15. 鱼翅买卖 _________
三. 用以上重点短语完成下列句子。
16. 但是你意识到当你每次在品尝一碗鱼翅汤时，你正在杀死一整头鲨鱼吗？
But do you realize that you're killing a whole shark each time you enjoy ____ ____ ____ ____
____ ____ ?
17. 在过去的20到30年里，有些种类的鲨鱼的数量已经下降了百分之九十多。
The numbers of some kinds of sharks have fallen by over 90 percent ____ ____ ____
20 to 30 years.
18. 如果我们不采取措施来阻止这种鱼翅买卖，鲨鱼可能有一天会消失。
Sharks may disappear one day if we do not do something to ____ ____ ____ ____
____ ____.
【合作探究】
探究一 背景知识：了解一下关于WildAid（野生救援）和WWF（世界自然基金会）的背景知识。
野生救援（WildAid）是在美国注册的非营利非政府的国际环保组织，使命是取缔针对濒危野生动物的非法贸易和缓解气候变化。野生救援的工作重点是提高公众意识，通过公共宣传活动，教育公众减少对濒危野生动物制品的消费需求，同时提高环境保护的意识。传递的信息简短有力：没有买卖，就没有杀害！野生救援目前开展的保护项目有：鲨鱼、大象、犀牛、蝠鲼、每日5事。“每日5事”鼓励人们每天做五件环保小事，从而节约能源，从简行、俭能、捡扔、减用、拣食五个方面号召人们提高环保意识，从身边的小事做起，绿色出行、选用节能产品、垃圾回收、减少一次性产品、食用绿色食品。每日5事的环保大使有成龙、杨澜、海清、黄海波和杜海涛等。野生救援通过媒体宣传，旨在影响人们的环保态度、激励人们的行为改变，减少对环境的影响，从而产生显著的集体影响。
世界自然基金会（World Wide Fund for Nature or World Wildlife Fund）是在全球享有盛誉的、最大的独立性非政府环境保护组织之一，自1961年成立以来，WWF一直致力于环保事业，在全世界拥有超过500万支持者和超过100个国家参与的项目网络。WWF1961年成立，总部位于瑞士格朗。WWF的使命是遏止地球自然环境的恶化，创造人类与自然和谐相处的美好未来。为此致力于：保护世界生物多样性；确保可再生自然资源的可持续利用；推动降低污染和减少浪费性消费的行动。
探究二 阅读课本P99，学习下列短语并在书中标记。
1. 听说 _____
2. 鱼翅汤_____
3. 在中国南部 _____
4. 一整只鲨鱼 _____
5. 一碗 _____
6. 切掉 _____
7. 扔回 _____
8. 不仅…而且… _____
9. 对…有害_____
10. 位于食物链顶端 _____
11. 在海洋生物系统里 _____
12. 给…带来危害 _____
13. 濒临灭绝 _____
14. ……的数量 _____
15. 降低了多少(幅度) _____
16. 在最近的20到30年里 _____
17. 环境保护组织_____
18. 健全法律 _____
19. 鲨鱼鳍买卖 _____
20. 到目前为止 _____
21. 科学研究 _____
探究三、阅读课文P99，完成下列任务
1. Fast reading
1) Read the title, the first and last sentences in each paragraphs and find the main ideas.
Para. 1 ___________________________________
Para. 2. ___________________________________
Para. 3. ___________________________________
2) Read the passage quickly and fill in the chart in 3a.
2. Careful reading
1) Sharks are endangered, read the passage carefully and judge the sentences.
( ) 1) Shark fin soup is famous and expensive all around the world.
( ) 2) We have to kill a whole shark to get a bowl of shark fin soup.
( ) 3) People cut off sharks’ fins and throw the sharks back into the ocean.
( ) 4) Sharks are in the bottom of the food chain in the ocean’s ecosystem.
( ) 5) Wild Aid and the WWF are environmental protection groups in China.
( ) 6) Wild Aid and the WWF are environmental protection groups in China.
2) Read the passage again and complete the short passage.
Some people like to eat shark fin soup, especially in 1__________ China. Many people don’t 2________ they are 3_______ a whole shark when they enjoy a bowl of shark fin soup.
But getting the shark fin is very 4_________. When people catch sharks, they 5__________
their fins and 6 _______ the sharks 7 _______ into the ocean. The sharks slowly 8 ______ because they can’t 9________ without fins. And it is also 10________ to the environment. Sharks are at the 11______ of the food chain. If the numbers of sharks 12_____ too low, it will 13_____ the balance of the nature.
Environmental protection groups have asked governments to 14_______ to stop the sale of the shark fins. Please say no to eating shark fin soup, and take actions to 15_____ the sharks!
探究四 知识链接
1. This is not only cruel，but also harmful to the environment.
这种做法不但残忍，而且对环境有害。
be harmful to…对……有害=be bad for…
小小翻译官
抽烟对我们的健康有害。
Smoking ____ ____ ____ our health.
＝Smoking ____ ____ ____ our health.
空气污染对我们的健康有害。
The air pollution ____ ____ ____ our health.
＝The air pollution ____ ____ ____ our health.
2. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
在过去的20到30年里，有些种类的鲨鱼的数量已经下降了百分之九十多。
……的数量 __________　
一些；若干 __________
语境串记(根据汉语提示完成句子)
____ ____ ____ measures have been taken to protect wild animals because ____ ____ ____ them has become smaller and smaller.
因为野生动物的数量变得越来越少，所以(我们)采取了一些措施来保护它们。
3. Sharks are at the top of the food chain, so if their numbers drop, the ocean's ecosystem will be in danger.
鲨鱼处于食物链的顶端，所以如果它们的数量下降，海洋生态系统将会陷入危险。
小小翻译官
濒危的____　危险的adj. ____ 　危险n. ____ 　处于危险之中____
语境串记(用danger的适当形式填空)
Sharks are ____ animals. But now they are ____. People catch them and cut off their fins, which leads them to death. So they are ____ ____ of extinction. If the numbers of sharks drop too low，it will bring ____ to all ocean life.
【课时小结】
重点单词
shark, fin, cruel, harmful, chain, ecosystem, low, industry, law, scientific
重点词组
hear of，cut off，throw…into，no longer，not only…but also，be harmful to，at the top of…，
the sale of…
重点句式
1. But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark fin soup？
你意识到当你每次在品尝一碗鱼鳍汤时，你正在杀死一整头鲨鱼吗？
2. This method is not only cruel, but also harmful to the environment.
这种方法不仅残酷，而且对环境有害。
3. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
在最近的20年到30年的时间里，这种鲨鱼的数量已经下降了90%。
4. So far, no scientific studies have shown that shark fins are good for health.
到目前为止，还没有科学研究证明鱼鳍对人们的健康有好处。
5. Sharks may disappear one day if we do not do something to stop the sale of shark fins.
如果我们不采取措施来阻止这种鱼鳍买卖，鲨鱼可能有一天会消失。
【达标检测】I. 根据句意及汉语提示填写单词。
1. I think it's _____ (残酷的) of them to shoot the animals.
2. With the development of _____ (工业), it will cause some pollution problems.
3. Reading in the sun is _____ (有害的) to your eyes.
4. The government has made some _____ (法律) to protect the wild animals.
5. We should use some _____ (科学的) ways to solve the problem.
II. 用括号内所给单词的适当形式填空。
6. Hainan is in the _____ (south) part of China.
7. We all support his _____ (science) research.
8. This is an _____ (danger) animal. We should try to save it.
9. Smoking is _____ (harm) to your health. You must give it up.
10. In fact, about 70 million sharks are _____ (catch)and traded every year.
III. 根据汉语意思完成句子，每空一词。
11. 保护海洋生态系统食物链的平衡很重要。
It’s very important to keep the balance of the _____ _____ in the ocean ecosystem.
12. 目前很多动物的数量在下降。
At present the number of many animals _____ _____.
13. 他的中指在工作时不小心被机器切掉了。
His middle finger _____ accidentally _____ _____ while working.
14. 让我们拒绝鱼翅汤吧，因为“保护鲨鱼就是保护我们自己”。
Let's _____ _____ _____ _____ _____ _____ because “to protect sharks is to protect ourselves”．
15. 听！贾森在练歌房里引吭高歌。
Listen! Jason is singing _____ _____ _____ his voice in the singing hall.参考答案：
【课前预习】
1. shark 2. fin 3. scientific 4. cruel 5. harmful 6. chain 7. ecosystem 8. industry 9. law
shark fin soup 11. at the top of the food chain 12. in the last 20 to 30 years
13. environmental protection groups 14. develop laws 15. the sale of shark fins
a bowl of shark fin soup 17. in the last 18. stop the sale of shark fins
【合作探究】
探究二
1. hear of 2. Shark fin soup 3. Southern China 4. A whole shark 5. a bowl of 6.cut off
7. throw…into 8. not only…but also 9. be harmful to 10. at the top of the food chain
11. In marine biological systems 12. be harmful to 13. in danger 14. the number of
15. reduce sth. by 16. in the last 20 to 30 years17. environmental protection groups
18. develop laws19. the sale of shark fins 20. so far,
21. scientific research
探究三
1.1)
Para. 1 Talk about shark fin soup.
Para. 2. Sharks are endangered now.
Para. 3. How governments can help
2)
Where is shark fin soup popular?
In southern China
Are numbers of sharks caught and traded every year?
70 million
What are two environmental groups against “finishing”?
Wild Aid(救助) & WWF
How can government help?
develop laws to stop the sale of shark fin
2. 1) FTTFFF
2) 1 southern 2 realize 3 killing 4 cruel 5 cut off 6 throw7 back 8 die 9 swim
armful 11 top 12 drop 13 break 14 develop laws 15 save
探究四
1. is harmful to；is bad for；does harm to；is harmful to
2. the number of；a number of；A number of；the number of
3. endangered；dangerous；danger；in danger
dangerous；endangered; in danger；danger
【达标检测】
I. 1. cruel 2. Industry 3. harmful 4. laws 5. scientific
II. 6. southern 7. scientific 8. endangered 9. harmful 10. caught
III. 11. food chain 12. is dropping 13. was; cut off 14. say no to shark fin soup
at the top of