Unit13 We're trying to save the earth! SectionA(3a-3b) 课件(共24张PPT)

(共24张PPT)
Unit 13
We’re trying to save the earth
Section A
(3a-3b)
Teaching Aims
Key words & phrases:
shark , fin, cruel, be harmful to, at the top of, at the bottom of ,chain, food chain, ecosystem , industry, law, scientific.
Key sentences:
1.But do you realize that you are killing a whole shark each time you enjoy a bowl of shark fin soup
2. But in fact ,around 70 million sharks are caught and traded in this industry every year.
To have the awareness of protecting sharks and respecting nature,saving them is save ourselves
Pre-reading
Let’s look at pictures of endangered animals below.
Saiga 高鼻羚羊
Hyacinth Macaw
紫蓝金刚鹦鹉
Snow Leopard 雪豹
Ring Tailed Lemur 环尾狐猴
Read the passage quickly. Then match each paragraph with the main idea.
While-reading
Paragraph 1 help save the sharks
Paragraph 2 the sharks are endangered
Paragraph 3 the shark fin soup
Save the Sharks!
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
Hear obout听说
切掉；切断
adj.残酷的；残忍的
adj. 有害的
be harmful to对……有害
不再
在……顶部或顶端
n.生态系统
When people catch sharks, they cut off their fins and throw
the sharks back into the ocean. This is not only cruel, but
also harmful to the environment. Without a fin, a shark can
no longer swim and slowly dies. Sharks are at the top of the
food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the
n.工业；行业
在过去的20到30年里，
是现在完成时的标志性时间状语之一
strongest in their food chain. But in fact, 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.
n.法律；法规
可数名词
到目前为止；迄今为止
是闲完时的标志性词
adj.科学上的；科学的
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop
laws to stop the sale of shark fins. So far, no scientific
studies have shown that shark fins are good for health, so why eat them Help save the sharks!
Read the passage in 3a quickly and answer the questions.
What do you know about sharks
Do you think sharks are endangered Why
What do you think might have caused a fall in the number of sharks
Sharks are at the top of the food chain in the ocean’s ecosystem.
Yes, I think sharks are endangered. Because when people catch sharks, they cut off their fins and throw the sharks back into the ocean. Without a fin, a shark can no longer swim and slowly dies.
People catch sharks and cut off their fins and throw them back into the ocean. Without a fin, a shark dies.
Post reading
3b.Read the passage again and fill in the blanks with the words in the box.
so although if but when
1. Many people do not realize they are killing a whole shark ______they enjoy a bowl of shark fin soup.
2. Sharks are at the top of the food chain, ________ if their numbers drop, the ocean’s ecosystem will be in danger.
3. Many think that sharks are too strong to be endangered, _______ they are wrong.
4. ________ there are no scientific studies to support this, a lot of people believe that shark fins are good for health.
5. Sharks may disappear one day _______ we do not do something to stop the sale of shark fins.
when
so
but
Although
if
在…顶部或顶端
食物链
Save the sharks!
Save the wild animals!
1. But in fact, around 70 million sharks are caught and traded in this industry every year.
in fact 事实上；实际上
Language points
We need to develop local industries.
我们需要发展地方工业。
In fact, I enjoy the movie more than I think .
事实上，我比我想象中更喜欢这个电影。
2. industry n. 工业；行业。既可以做可数名词也可以做不可数名词，heavy/light industry重、轻工业
2.When people catch sharks, they cut off their fins and throw the sharks back into the ocean.
cut off 切掉；切断
The electricity has been cut off again.
又停电了。
3.The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
the numbers of ……的数量；是the number of 的复数形式。
此处，numbers 表示不同种类鲨鱼的数量。
The numbers of students are increasing
学生的数量在不断增加
the number of 与a number of
the number of
……的数量
+可数名词复数做主语时，谓语动词用单数
a number of
一些；若干
+可数名词复数做主语时，谓语动词用复数
4.They have even asked governments to develop laws to stop the sale of shark fins.
law n. 法律；法规。 lawyer n. 律师,可数名词
obey the law 遵守法律 break the law 违法
He is a lawyer and he always tell us that everyone should
obey the law.
他是一名律师并且总是告诉我们每个人都应该遵守法律。
5.So far, no scientific studies have shown that shark fins are good for health, so why eat them
so far 到目前为止；迄今为止。 常用于现在完成时。
What have you found so far ？
到目前为止，你发现了什么？
6.The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
“fall by” 意为“下降了”，by表示变化的幅度。fall to意为“下降到”。
Last year, the price of this kind of computer was 8000yuan. This year it falls to 7, 000 yuan. It falls by 12.5 percent.
1. They ______their fins when people catch sharks. It’s cruel (切除)
2. My mother was _________ a book lover(不再)
3. Sharks are standing ____________the food chain in the ocean. (在...顶端)
4. _______, I was already finished it . (实际上)
5. Now, this kind of computers ________12.5 percent. (下降了)
Exercise
cut off
no longer
at the top of
In fact
fall by
Homework
1.Make a poster
to call on people to protect wild animals.
2.Retell the passage