Unit 13 We're trying to save the earth Section A （3a-3b）课件(共22张PPT)

(共22张PPT)
Unit 13
We’re trying to save the earth!
Section A 3a~3b
Factories pour dangerous gases into the air. Factories produce too much dangerous smoke.
Cars also pour dangerous gases into the air. The traffic produces too many fumes.
Some people smoke in public places.
Air pollution
Natural resources are disappearing at a dangerous rate.
以危险的速度
Natural resources
desert
Water pollution
serious pollution
We are harming our planet in so many ways.
伤害
air pollution
soil pollution
water pollution
close down the factories;
help to clean up the river;
take the bus or subway;
ride a bike;
bring a bag to go shopping,throw rubbish in the cans;
turn off the lights when you leave a room;
use paper or resusable bags;
recycle books and paper;
turn off the shower when you wash your hair;
don't use napkins;
rethink,reuse, recycle ... ...
solutions
鲨鱼[Shark]
鲨鱼，生活在海洋中，是海洋中最凶猛的鱼类。
鲨鱼早在恐龙出现前三亿年前就已经存在地球上，至今已超过五亿年，它们在近一亿年来几乎没有改变。鲨鱼，在古代叫作鲛、鲛鲨、沙鱼，是海洋中的庞然大物，所以号称“海中狼”。还有鲸鲨，大白鲨。目前因为有大多数人认为鲨鱼的软骨（即鱼翅）中蛋白质很高，但这是错误的。鸡蛋的蛋白质远远超过鱼翅。因为人类错误的观念，鲨鱼几十年来被大量猎杀，专家分析再这样下去，鲨鱼将绝种，请保护好鲨鱼。吃鱼翅是可以的，但也对人体有害，因为鲨鱼翅中含有一定量的神经毒素。
Fast reading Read the whole passage quickly.
What does the passage tell us to do
Help save the sharks!
3a
Task 1: Answer the question:
Task 2: Read the passage quickly and match each paragraph
with the main ideas.
Para 1 Something happens when
people cut off sharks fins.
Para 2 Environmental protection
groups have done something
to protect sharks.
Para 3 You are killing a whole shark
when you enjoy a bowl of shark
fin soup.
Sharks are endangered, read and judge(判断) the
sentences.
Read the first paragraph
1. Shark’s fin（鱼鳍）soup is famous and
expensive all around the world.
2. We have to kill a whole shark to get a
bowl of shark’s fin soup.
×
√
Careful reading Read the paragraphs one by one.
Read the second paragraph
1. People cut off sharks’ fins and throw
the sharks back into the ocean.
2. Sharks are in the bottom of the food chain
in the ocean’s ecosystem.
√
×
n. 生态系统
食物链
Read the third paragraph
1. WildAid and the WWF are environmental
protection groups in the world.
2. Shark’s fins are good for health.
×
√
Where shark fin soup is popular
The number of sharks caught and traded every year
How much the numbers of some kinds of sharks have fallen in the last 20 to 30 years
Two environmental groups against "finning"
In southern China
Around 70 million
By over
90 percent
WildAid and
the WWF
After reading
Task One:
Read the passage again.
Task Two: Fill in the blanks according to the passage.
When people ______ sharks, they ____ ______ their fins and _____ the shark back into the ocean. This is _____ _____
cruel, _____ _____ harmful to the environment. _______ a fin, a shark can no longer ______ and slowly ______. Sharks are at the ____ of the food chain in the ocean's ecosystem. If their numbers drop too low, it will ______ danger to all ocean life. Many believe that sharks can never been __________ because they are the strongest in their food chain. But in fact, around 70 million sharks are _______ and traded in this industry every year. The numbers of some kinds of sharks have fallen _____ 90 percent in the last 20 to 30 years.
catch
throw
only
not
but
also
Without
dies
swim
top
bring
endangered
caught
by
cut
off
Task One:
Sharks are endangered, what should we do to help them
Discuss in groups and then show others your ideas.
Task Two:
From this passage, mainly conclude your ideas about how to read an English passage effectively.
3b
Read the passage again and fill in the blanks with the words in the box.
so although if but when
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.
when
so
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.
but
Although
if
Let's do some exercises.
1.Don’t forget to 　　　　 the lights when leaving the room.
2.Riding a bike 　　　　 our health.
3.We have learned thirteen units 　　　　.
4.How much did you 　　　　your dictionary yesterday
5.Have you ever 　　　　 an environmental project
Ⅰ.用方框中所给词组的适当形式填空
turn off,take part in,pay for,so far,be good for
turn off
is good for
so far
pay for
taken part in
Ⅱ.根据汉语意思完成句子
1.我能买得起这辆汽车。
I can 　　　　　　　　　　　　the car.
2.他的哥哥花了20美元买了新鞋。
His brother 　　　　20 dollars 　　　　his new shoes.
3.如果它们的数量降到太低,它将会给全部海洋生命带来危险。
If their numbers 　　　　too low,it 　　　　 danger to all ocean life.
4.到目前,没有科学研究显示鱼翅对健康有好处,所以为什么吃它们呢
　　 　　,no scientific studies 　　　　　　　　that shark fins 　　　　　　　　　health,so why eat them
5.鲨鱼处于食物链的顶端。
Sharks are 　　　　　　　the food chain.
afford to buy
paid for
drop will bring
So far
have shown
are good for
at the top of
Animals are our friends,
we should protect them.
保护动物,人人有责。
Homework
Finish making the proposal(倡议书).
2. Find pictures and passages about more endangered animals, and introduce them to your classmates next time.