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(共17张PPT)
教学材料：外研版高中英语新教材选择性必修第二册
教学内容：Unit 5 A Delicate World——Macquarie Island
第二课时：Understanding Ideas
Macquarie Island
from Chaos to Conservation
out of order
混乱
protection
保护
Look at the picture and answer the questions.
What animals can you see in the picture
2. What kind of changes would take place if cats, rats and rabbits were introduced to an environment like this
They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance.
Penguins , an elephant seal , a wild bird
___________ adj. 中间的，半途的
___________ adv. 显著地
___________ n. 遗产，传统
___________ n. 栖居的动物
___________ n. 企鹅
___________ n. 干预，介入
New words and expressions:
___________ n. 栖息地
___________ n. 事件
___________ adv. 后来，随后
___________ n. 胃口，食欲
___________ v. 大大增加，倍增
___________ v. 应该做
halfway
dramatically
heritage
owe
multiply
appetite
subsequently
incident
habitat
penguin
intervention
inhabitant
___________ n. 植物，草木
___________ n. 侵蚀
___________ n. 大混乱，紊乱
___________ n. 保护
___________ n. 病毒
___________ n. 附言
New words and expressions:
___________ v. 使变少，使减少
___________ n. 夹子，陷阱
___________ n. 离开
___________ v. 倒坍，塌下
___________ adj. 大量的，多的
___________ n. 生态
vegetation
erosion
chaos
ecology
substantial
collapse
departure
trap
decrease
virus
postcript
protection
To analyse how Macquarie Island was saved from destruction.
To inform readers of the chaos caused on Macquarie Island by Humans.
To entertain readers with a funny story about what happened on Macquarie Island.
To suggest ways in which an ecosystem can be protected.
Listening to the tape:
Choose the author’s purpose in writing the passage and give your reasons.
1 When did Macquarie Island`s tragic story begin
A In 1870
B When humans arrived on the island.
C When humans planted many different plants there.
D When people raised rabbits there.
2 Which of the following animals wasn`t brought to the island by humans
A Parakeets. B Cats. C Mice. D Rabbits.
Fast reading
Read the passage again and answer the following questions.
3 Which way was mentioned to remove rabbits
A Using traps and dogs.
B Raising more cats.
C Releasing a virus onto the island.
D Killing them.
4.According to the passage, which of the following is right
A Macquarie Island became a nature reserve in the 1980s.
B The last Macquarie Island cat disappeared in 1990.
C The virus solved the rabbit problem.
D Rabbits developed an immunity to the virus and their numbers exploded once again.
Read the para. 1 and think:
From what aspects does the writer introduce the island
1. Location
1486km
1294km
2. Shape
long and thin
How was the shape formed
Strong winds and stormy seas sculpted its shape.
In the ________________ ocean , ________ between Australia and Antarctic.
South-west Pacific
halfway
3. landscape
Green grass; bare rock; a wild and natural beauty
Careful Reading
4. Inhabitants
royal penguins ; king penguins; elephant seals
Humans arrived in 1810
To control rats and mice
To be a source of food for humans
took over the island
ate birds’ eggs
Attacked baby birds
Purposes
Purposes
Results
Results
Results
Developed an appetite for birds
multiplied quickly
ate the native vegetation
dug holes
caused soil erosion
more rabbits meant more cats
Read para 2 & 3, what happened to Macquarie Island before the 1970s
While the cat`s away, the mice will play.
Time In the 1970s In the 1980s
actions
results
The large number of mice and rats
The remaining 10000 rabbits
Disastrous results in 2006
Caused some land to collapse
Killed a substantial number of penguins
Remove all the invading species once and for all.
Fill in the following blanks with information in para.4-5
Became an official nature reserve;
A virus was released to control rabbits
Traps and dogs --- catch the cats
Rabbits were reduced to 10000.
The cats killed more native birds
The last cat was caught in 2000
Rats started to increase
1. What’s the author’s mission on the island
Remove the last remaining invading species
2. How do you understand the sentence “ we human owe it to the island to give it a happy ending.” at the end of the passage
It is humans that have caused great damage to the island and it is our duty to help it return to normal.
Read the last paragraph with the following questions.
To avoid similar situations in the future, we should protect the natural ecosystem and be aware of the potential impact that human activities can have on ecosystems.
3. How could similar situations be avoided in the future
Careful Reading
Postscript:
In 2014, Macquarie Island is pest-free and its ecology is on the road to recovery.
In 2016, the permanent scientific research station was closed down.
Better late than never！
Qinling villas
Kubuqi desert
In 2014, Macquarie Island is pest-free and its ecology is on the road to recovery
In 2016, the permanent scientific research station was closed down.
Are there similar
situations in our
country
Live harmoniously
past
now
Clear waters and lush mountains are as valuable as cold and silver.
We should live harmoniously with nature. With our joint efforts, our world is sure to become a more hospitable place.
Thank you for watching!

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