外研版（2019）选择性必修 第二册Unit 5 A delicate world Understanding ideas 课件（共33张，内嵌音视频）
文档属性
| 名称 | 外研版（2019）选择性必修 第二册Unit 5 A delicate world Understanding ideas 课件（共33张，内嵌音视频） |  | |
| 格式 | pptx | ||
| 文件大小 | 18.3MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-11-21 11:45:23 | ||
图片预览
文档简介
(共33张PPT)
Unit 5 Understanding ideas
MACQUARIE ISLAND:
from Chaos to Conservation
麦夸里岛：从混乱不堪到精心保护
阅读课件
To conclude the whole process about how Macquarie Island was destroyed.
To learn to retell the passage by using some phrases which talk about cause and effect.
To think deeply about the effect of these human activities on Macquarie Island and call on people to protect our delicate world.
Learning objectives
Word and expressions
halfway adj. 中间的，半途的 50
dramatically adv. 显著地 50
heritage n. 遗产；传统 50
inhabitant n. 栖居的动物 50
penguin n. 企鹅 50
habitat n. 栖息地 50
rat n. 大老鼠 50
subsequently adv. 后来，随后 50
appetite n. 胃口，食欲 50
multiply v. （使）大大增加，倍增 50
vegetation n. 植物，草木（总称） 50
erosion n. 侵蚀 50
parakeet n. 长尾（小）鹦鹉 51
chaos n. 大混乱；紊乱 51
conservation n. 保护 51
virus n. 病毒 51
decrease v. （使）变小，减少 51
trap n. 夹子，陷阱 51
departure n. 离开 51
immunity n. 免疫力 51
explode v. 突然增加 51
collapse v. 倒坍；塌下 51
substantial adj. 大量的，多的 51
incident n. 事件 51
intervention n. 干预，介入 51
owe v. 应该做；对...负有...的义务 51
postscript n. 附言 51
pest n. 有害小动物；害虫 51
ecology n. 生态 51
What do you think of our earth's ecosystem
Warming-up
When we are talking about the ecosystem, most of us would only think about animals and plants. But the truth is our daily activities are playing a vital role in nature just like everything else.
Humans are part of Earth’s ecosystems. Humans can affect ecosystems in positive and negative ways. For example, to have a positive influence on ecosystems, people can plant trees, feed and protect animals, recycle thins, etc. However, deforestation, air and water pollution and excessive waste affect ecosystems in a negative way.
1 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
birds
penguins
They would hurt the birds and eat the native vegetation, thus upsetting the local ecological balance.
The picture is taken in Macquarie Island(麦夸里岛). Have you ever heard of the island How much do you know about it
Look at the picture below and answer the questions.
1
Pre-reading
◆ It lies in the South-west Pacific Ocean.
◆ Politically, it is part of Tasmania(塔斯马尼亚岛), Australia since 1900.
◆ It became a Tasmanian State Reserve(塔斯马尼亚洲自然保护区) in 1978, and a World Heritage Site in 1997.
What do you think of this island
Macquarie Island:
Chaos
to
Conservation
from
Possible answer:
Non-native species introduced to Macquarie Island attacked native birds and led to a substantial reduction of bird population, and even the extinction of parakeets. In addition, non-native species ate and devastated the native vegetation. All of this played a part in upsetting the natural harmony of the island. But now the island's ecology is on the road to recovery with human efforts.
Read the passage and find out what happened to Macquarie Island.
2
While-reading
1. Why did the author come to Macquarie Island
2. How did rats and mice come to Macquarie Island
3. What did experts use to remove the rabbits from Macquarie Island
To participate in a programme to tackle the problem.
They were brought there along with the ships unknowingly when the humans arrived on the island.
A virus.
Read the passage again and answer the questions.
Tips
the first sentene of each paragraph
key words of each paragraph
Read for general idea
Para 1: the general introduction
Para 2-3: the process from harmonious balance to choas
Para 4: measures to save it
Para 5: the worse situation
Para 6: actions to solve the problem
The main idea of each paragraph
What happened to Macquarie Island
After rats, mice,cats and rabbits were brought to Macquarie Island , they attacked native birds, ate native vegetation and caused soil erosion, which broke the island’s ecosystem. But now the island's ecology is on the road to recovery with humans’ efforts.
location
shape
landscape
inhabitants
in the South-west Pacific ocean , halfway between Australia and Antarctic.
long and thin
green grass and bare rock contrast dramatically, giving it a wild and natural beauty.
royal penguins, king penguins and elephant seals
live in perfect harmony with...
general information
Humans arrived on Macquarie Island.
unknowingly brought rats and mice
eating the birds’ eggs and attacking baby birds
To control the rats and mice.
Cats were brought to the island.
The cats developed an appetite for birds.
Rabbits were introduced to the island.
multiplied rapidly
dig holes
soil erosion
Parakeets died out
measures
a virus was released
rabbit population decreased
Cats turned to native birds
an official nature reserve
digging caused land collapse
traps and dogs were used to catch the cats
no cats in 2000
mouse andrat population increase
rabbit number exploded
killing a substantial penguins
a virus was released
rabbit population decreased
Cats turned to native birds
an official nature reserve
digging caused land collapse
traps and dogs were used to catch the cats
no cats in 2000
killing a substantial penguins
Are the humans’ measures effective
Why What’s the real problem
These measures fail to capture the essence of issue, only solving the current urgent problems.
The real problem is that the human activities caused the chaos.
What happened to Macquarie Island after 2006
Mission
Measures
The first step involves poison dropping….
The next step is to remove……
To participate in the programme to
tackle this very problem.
1. To analyse how Macquarie Island was saved from destruction.
2. To inform readers of the chaos caused on Macquarie Island by humans.
3. To entertain reader with a funny story about what happened on Macquarie Island.
4. To suggest ways in which an ecosystem can be protected.
Choose the author's purpose in writing this passage and give your reasons.
3
they took over the island, eating the birds’eggs and attacking baby birds.
Cats were brought to the island.
The cats developed an appetite for the birds.
Rabbits were introduced to the island.
To provide food for humans.
Rabbits multiplied and caused soil erosion, and the exploding rabbit population provided plentiful food for the cats. This led to more cats hunting the birds. As a result, parakeets died out in 1891.
A virus was released on the island.
To remove all the rabbits from the island.
Substantial reduction of rabbit population led to cats killing more native birds.
Traps and dogs were used.
To catch the cats.
The departure of the cats resulted in an increasing population of rats and mice. And the rabbit population exploded once again.
Poison and dogs were used.
To remove all the remaining invading species.
The island was pest-free and its ecology is on the road to recovery.
Now talk about how human interference led to such severe consequences for Macquarie Island.
Organise information from the passage and complete the flow chart.
4
1. What is your understanding of ''…we humans owe it to the island to give it a happy ending'' in the last paragraph
Before humans arrived, all the living things on the island existed in perfect harmony with their natural habitat for thousands of years. It was the arrival of humans that destroyed the ecological balance, so we humans are responsible for restoring it and it is our duty to help it return to normal.
Think & Share
Post-reading
2. Do you think it was right to eradicate the “pests” from Macquarie Island Give your reasons.
I think it was right to eradicate the “pests” from Macquarie Island. The island’s ecology is finally on the road to recovery.
This is because the author is participating in the programme to tackle the very problem. And the postscript of the passage showed that in 2014, Macquarie Island was declared pest-free and the island’s ecology is finally on the road to recovery.
Think & Share
3. How could similar situations be avoided in the future
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.
Think & Share
4. What language can you use to talk about cause and effect How would you apply it to your reading and writing
Strong winds and stormy seas have helped sculpt its long, thin shape.
These small animals quickly took over the island, eating the birds' eggs and attacking baby birds.
Unfortunately, the cats subsequently developed an appetite for the birds, too.
They multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion.
This in turn led to more cats hunting the birds.
It turned out that they developed an immunity to the virus.
Think & Share
Work with your partners and design a poster to call for us humans to protect the natural ecosystem.
be aware of the potential impact that human activities have on the ecosystem
Proposal (call on people to...)
Presentation
Better late than never！
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
Kubuqi
desert
recent history
now
ancient time
Clear Waters and Lush
Mountains Are as
Valuable as Gold and
Sliver.
---Xi Jinping
唯有了解，我们才会关心；
Only if we understand can we care.
唯有关心，我们才会采取行动；
Only if we care will we help.
唯有行动，生命才会有希望。
Only if we help shall all be saved.
Macquarie Island was a beautiful place 1._______its native inhabitants, including royal 2.________(penguin), king penguins, and elephant seals, existed 3._____ harmony with their natural habitat for thousands of years. However, in 1810, humans 4.________(arrive) on the island with rats and mice. They quickly took over the island, eating birds’ eggs and 5._________(attack) baby birds. Cats 6._____________(bring) to control the rats and mice, but they also liked eating birds. Meanwhile, rabbits were introduced to the island but the exploding rabbit population provided food for cats, meaning that the number of cats also increased 7._________(rapid).
where
penguins
in
arrived
attacking
were brought
rapidly
Summary
This in turn led to more cats hunting birds. The end result was that parakeets, once large in number and native to the island, died 8.______in 1891.
A virus 9.________(release) onto the island caused rabbit population to decrease, but the cats, without enough rabbits to eat, killed native birds for food. Although all the cats were caught in 2000，rats and mice exploded once again. Besides, the rabbits’ 10._______(dig) caused some land to collapse and killed many penguins.
A programme was started to tackle this problem. This intervention is a long process, but we humans owe it to the island to give it a happy ending.
out
released
digging
Prepare a short speech with the title“What we humans should do to protect our natural ecosystem ”
Homework
Unit 5 Understanding ideas
MACQUARIE ISLAND:
from Chaos to Conservation
麦夸里岛：从混乱不堪到精心保护
阅读课件
To conclude the whole process about how Macquarie Island was destroyed.
To learn to retell the passage by using some phrases which talk about cause and effect.
To think deeply about the effect of these human activities on Macquarie Island and call on people to protect our delicate world.
Learning objectives
Word and expressions
halfway adj. 中间的，半途的 50
dramatically adv. 显著地 50
heritage n. 遗产；传统 50
inhabitant n. 栖居的动物 50
penguin n. 企鹅 50
habitat n. 栖息地 50
rat n. 大老鼠 50
subsequently adv. 后来，随后 50
appetite n. 胃口，食欲 50
multiply v. （使）大大增加，倍增 50
vegetation n. 植物，草木（总称） 50
erosion n. 侵蚀 50
parakeet n. 长尾（小）鹦鹉 51
chaos n. 大混乱；紊乱 51
conservation n. 保护 51
virus n. 病毒 51
decrease v. （使）变小，减少 51
trap n. 夹子，陷阱 51
departure n. 离开 51
immunity n. 免疫力 51
explode v. 突然增加 51
collapse v. 倒坍；塌下 51
substantial adj. 大量的，多的 51
incident n. 事件 51
intervention n. 干预，介入 51
owe v. 应该做；对...负有...的义务 51
postscript n. 附言 51
pest n. 有害小动物；害虫 51
ecology n. 生态 51
What do you think of our earth's ecosystem
Warming-up
When we are talking about the ecosystem, most of us would only think about animals and plants. But the truth is our daily activities are playing a vital role in nature just like everything else.
Humans are part of Earth’s ecosystems. Humans can affect ecosystems in positive and negative ways. For example, to have a positive influence on ecosystems, people can plant trees, feed and protect animals, recycle thins, etc. However, deforestation, air and water pollution and excessive waste affect ecosystems in a negative way.
1 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
birds
penguins
They would hurt the birds and eat the native vegetation, thus upsetting the local ecological balance.
The picture is taken in Macquarie Island(麦夸里岛). Have you ever heard of the island How much do you know about it
Look at the picture below and answer the questions.
1
Pre-reading
◆ It lies in the South-west Pacific Ocean.
◆ Politically, it is part of Tasmania(塔斯马尼亚岛), Australia since 1900.
◆ It became a Tasmanian State Reserve(塔斯马尼亚洲自然保护区) in 1978, and a World Heritage Site in 1997.
What do you think of this island
Macquarie Island:
Chaos
to
Conservation
from
Possible answer:
Non-native species introduced to Macquarie Island attacked native birds and led to a substantial reduction of bird population, and even the extinction of parakeets. In addition, non-native species ate and devastated the native vegetation. All of this played a part in upsetting the natural harmony of the island. But now the island's ecology is on the road to recovery with human efforts.
Read the passage and find out what happened to Macquarie Island.
2
While-reading
1. Why did the author come to Macquarie Island
2. How did rats and mice come to Macquarie Island
3. What did experts use to remove the rabbits from Macquarie Island
To participate in a programme to tackle the problem.
They were brought there along with the ships unknowingly when the humans arrived on the island.
A virus.
Read the passage again and answer the questions.
Tips
the first sentene of each paragraph
key words of each paragraph
Read for general idea
Para 1: the general introduction
Para 2-3: the process from harmonious balance to choas
Para 4: measures to save it
Para 5: the worse situation
Para 6: actions to solve the problem
The main idea of each paragraph
What happened to Macquarie Island
After rats, mice,cats and rabbits were brought to Macquarie Island , they attacked native birds, ate native vegetation and caused soil erosion, which broke the island’s ecosystem. But now the island's ecology is on the road to recovery with humans’ efforts.
location
shape
landscape
inhabitants
in the South-west Pacific ocean , halfway between Australia and Antarctic.
long and thin
green grass and bare rock contrast dramatically, giving it a wild and natural beauty.
royal penguins, king penguins and elephant seals
live in perfect harmony with...
general information
Humans arrived on Macquarie Island.
unknowingly brought rats and mice
eating the birds’ eggs and attacking baby birds
To control the rats and mice.
Cats were brought to the island.
The cats developed an appetite for birds.
Rabbits were introduced to the island.
multiplied rapidly
dig holes
soil erosion
Parakeets died out
measures
a virus was released
rabbit population decreased
Cats turned to native birds
an official nature reserve
digging caused land collapse
traps and dogs were used to catch the cats
no cats in 2000
mouse andrat population increase
rabbit number exploded
killing a substantial penguins
a virus was released
rabbit population decreased
Cats turned to native birds
an official nature reserve
digging caused land collapse
traps and dogs were used to catch the cats
no cats in 2000
killing a substantial penguins
Are the humans’ measures effective
Why What’s the real problem
These measures fail to capture the essence of issue, only solving the current urgent problems.
The real problem is that the human activities caused the chaos.
What happened to Macquarie Island after 2006
Mission
Measures
The first step involves poison dropping….
The next step is to remove……
To participate in the programme to
tackle this very problem.
1. To analyse how Macquarie Island was saved from destruction.
2. To inform readers of the chaos caused on Macquarie Island by humans.
3. To entertain reader with a funny story about what happened on Macquarie Island.
4. To suggest ways in which an ecosystem can be protected.
Choose the author's purpose in writing this passage and give your reasons.
3
they took over the island, eating the birds’eggs and attacking baby birds.
Cats were brought to the island.
The cats developed an appetite for the birds.
Rabbits were introduced to the island.
To provide food for humans.
Rabbits multiplied and caused soil erosion, and the exploding rabbit population provided plentiful food for the cats. This led to more cats hunting the birds. As a result, parakeets died out in 1891.
A virus was released on the island.
To remove all the rabbits from the island.
Substantial reduction of rabbit population led to cats killing more native birds.
Traps and dogs were used.
To catch the cats.
The departure of the cats resulted in an increasing population of rats and mice. And the rabbit population exploded once again.
Poison and dogs were used.
To remove all the remaining invading species.
The island was pest-free and its ecology is on the road to recovery.
Now talk about how human interference led to such severe consequences for Macquarie Island.
Organise information from the passage and complete the flow chart.
4
1. What is your understanding of ''…we humans owe it to the island to give it a happy ending'' in the last paragraph
Before humans arrived, all the living things on the island existed in perfect harmony with their natural habitat for thousands of years. It was the arrival of humans that destroyed the ecological balance, so we humans are responsible for restoring it and it is our duty to help it return to normal.
Think & Share
Post-reading
2. Do you think it was right to eradicate the “pests” from Macquarie Island Give your reasons.
I think it was right to eradicate the “pests” from Macquarie Island. The island’s ecology is finally on the road to recovery.
This is because the author is participating in the programme to tackle the very problem. And the postscript of the passage showed that in 2014, Macquarie Island was declared pest-free and the island’s ecology is finally on the road to recovery.
Think & Share
3. How could similar situations be avoided in the future
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.
Think & Share
4. What language can you use to talk about cause and effect How would you apply it to your reading and writing
Strong winds and stormy seas have helped sculpt its long, thin shape.
These small animals quickly took over the island, eating the birds' eggs and attacking baby birds.
Unfortunately, the cats subsequently developed an appetite for the birds, too.
They multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion.
This in turn led to more cats hunting the birds.
It turned out that they developed an immunity to the virus.
Think & Share
Work with your partners and design a poster to call for us humans to protect the natural ecosystem.
be aware of the potential impact that human activities have on the ecosystem
Proposal (call on people to...)
Presentation
Better late than never！
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
Kubuqi
desert
recent history
now
ancient time
Clear Waters and Lush
Mountains Are as
Valuable as Gold and
Sliver.
---Xi Jinping
唯有了解，我们才会关心；
Only if we understand can we care.
唯有关心，我们才会采取行动；
Only if we care will we help.
唯有行动，生命才会有希望。
Only if we help shall all be saved.
Macquarie Island was a beautiful place 1._______its native inhabitants, including royal 2.________(penguin), king penguins, and elephant seals, existed 3._____ harmony with their natural habitat for thousands of years. However, in 1810, humans 4.________(arrive) on the island with rats and mice. They quickly took over the island, eating birds’ eggs and 5._________(attack) baby birds. Cats 6._____________(bring) to control the rats and mice, but they also liked eating birds. Meanwhile, rabbits were introduced to the island but the exploding rabbit population provided food for cats, meaning that the number of cats also increased 7._________(rapid).
where
penguins
in
arrived
attacking
were brought
rapidly
Summary
This in turn led to more cats hunting birds. The end result was that parakeets, once large in number and native to the island, died 8.______in 1891.
A virus 9.________(release) onto the island caused rabbit population to decrease, but the cats, without enough rabbits to eat, killed native birds for food. Although all the cats were caught in 2000，rats and mice exploded once again. Besides, the rabbits’ 10._______(dig) caused some land to collapse and killed many penguins.
A programme was started to tackle this problem. This intervention is a long process, but we humans owe it to the island to give it a happy ending.
out
released
digging
Prepare a short speech with the title“What we humans should do to protect our natural ecosystem ”
Homework