外研版（2019）选择性必修第二册Unit 5 A delicate World Understanding ideas 课件(共24张PPT，内嵌视频)

(共24张PPT)
Learning Objectives
We will be able to ...
find out what happened to Macquarie Island;
make a flow chart to show humans’ actions, purposes and the results.
talk about how to protect our natural ecosystem.
流程图
麦夸里岛
自然生态系统
Unit 5 A delicate world
Understanding ideas
2. Background information:
Macquarie/m 'kw ri/ Island(麦夸里岛）
Guess Game：What animals are they
royal penguins 皇家企鹅
king penguin 帝企鹅
elephant seals 海象 ( seal :海豹)
sea mew 海鸥
They all live in Macquarie Island.
=native inhabitants
1.Guess Game：What animals are they
rabbits
humankind 人类(总称)
dog
rat 大老鼠
cat
mice
(mouse的复数)
non-native inhabitants
3. Question:
What will happen if all these animals are put in the island
＋
I think the island will be _______.
native inhabitants
non-native inhabitants
=
crowded 拥挤的
destroyed毁掉的
damaged 受损的
chaotic 混乱的
...
Let’s read deeply into the passage and find out...
4. Read the title and predict the main idea of the passage.
Macquarie Island:
from Chaos to Conservation
/'ke s/ n.混乱；紊乱
/k ns 've n/ n.
（对自然环境的）保护
n. a state of complete confusion and lack of order
n. protection of the natural environment
1.The Main idea: What happened to Macquarie island
_______( Native inhanbitant / Non-native species) introduced to Macquarie Island ______( helped / attacked ) native birds, and led to a __________( subtle / substantial) reduction of bird population and even the extinction(灭绝) of parakeets. In addition, non-native species ate and devastated the native vegetation. All of this played a part in ____ ___________( upsetting /cheering ) the natural harmony of the island. But now the island’s ecology（生态） is on the road to _________ ( destruction / recovery) with human efforts.





Let’s read together!
Non-native species introduced to Macquarie Island attacked native birds, and led to a substantial reduction of bird population and even the extinction(灭绝) 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（生态）is on the road to recovery with human efforts.
2. Match the main ideas with paragraphs and find the key words .
Para 1
Para 2
Para 3
Para 4
Para 5
Para 6
A. To protect native animals, invading animals species had to removed.
B. For biological chain, the island’s recent story is really a tragic story.
C. For some reasons, there were no cats in 2000.
D. Macquarie island is UNESCO world Heritage Site.
E. Because of biological chain, parakeets died out.
F. The rat, mouse and rabbit problem should be solved once and for all.
ADD YOUR TITLE HERE
The brief introduction of Macquarie Island
L______
S______
L_______
Title (头衔）
I_________
in the south-west Pacific Ocean, halfway between
Australia and Antactica
long and thin shape caused by strong wind and stormy seas
green grass and bare rock contrast dramatically
a UNESCO World Heritage Site and natural beauty
Penguins, elephant seals existed in harmony with their natural habitant for thounsands of years
1. Find the detailed description of Macquarie island in paragraph 1 and summarize the aspects
Location
Shape
Landscape
Inhabitants
harmony, but then
Para. 2-6
2. Read para2-6 and complete the flow chart.
Time(s)
in 1810
Human arrived
to live there
brought rats and mice to eat bird’s eggs and attack baby birds.
brought ___
developed an a________ for the birds, too
introduced ____
to be a source of f_____ for human
cause soil e_____ and parakeets d_____ _____
in 1891
released v___
to r_____ all the rabbits
cats killed native birds u______ 60,000 each year ___________ ______
in the 1970s
used t____ and dogs
to _____ the cats
increase the p_________ of mouse and rat
used p____ and dogs
in the 1980s
in 2006
to remove all the invading species
declared pest-free and its ecology is on the road to recovery
宣布无虫害，其生态正在恢复
Time(s)
in 1810
Human arrived
to live there
brought rats and mice to eat bird’s eggs and attack baby birds.
brought ___
developed an ________ for the birds, too
introduced ____
to be a source of _____ for human
cause soil _____ and parakeets ______ ______
in 1891
released ____
to _____ all the rabbits
cats killed native birds ______ 60,000 each year ___________ ______
in the 1970s
used ____ and dogs
to _____ the cats
increase the p_________ of mouse and rat
used ____ and dogs
in the 1980s
in 2006
to remove all the invading species
declared pest-free and its ecology is on the road to recovery
appetite食欲
food
erosion侵蚀
died out灭绝
virus病毒
remove
up to多达
traps陷阱
catch
population
poison毒药
宣布无虫害，其生态正在恢复
The Actions caused disastrous effects on ecosystem.
灾难性的
almost 200years
Time(s)
in 1810
Human arrived
to live there
brought rats and mice to eat bird’s eggs and attack baby birds.
brought ___
developed an ________ for the birds, too
introduced ____
to be a source of _____ for human
cause soil _____ and parakeets ______ ______
in 1891
released ____
to _____ all the rabbits
caused soil _____ and parakeets ______ ______
in the 1970s
used ____ and dogs
to _____ the cats
increase the _________ of mouse and rat
used ____ and dogs
in the 1980s
in 2006
to _____ all the invaders
declared pest-free and its ecology is on the road to recovery
Who is the chief (最主要的）invading species
宣布无虫害，其生态正在恢复
__________
Para 6:
...we humans owe it to the island to give it a happy ending.
(Whoever started the trouble should end it!)
解铃还须系铃人
3. From "Tragic story to pest-free happy ending after more than 200 years, because of a small event, human beings have paid such a huge price."
How could similar situations be avoided in the future
Post-reading: Think and share
protect the natural ecosystem ;
prevent species invasion caused by humans
be aware of the potential impact on nature;
live in the harmony with the nature ;
take the road of sustainable development;
To avoid similar situations in the future, we should...
保护自然生态系统
要意识到对自然的潜在影响
与自然和谐相处
走可持续发展之路……
Clear Waters and Lush Mountains are as Valuable as Gold and Sliver.
—— Xi Jinping
防止人类造成的物种入侵
Q: As high school students, What can we do to protect our environment (Group work)
plant more plants
collect waste for recycling
prevent pouring waste water into river, lake and field
don’t pick the flowers or step on the grass in public
tell people fully realize the importance of environment protection through education
reduce the use of plastic bags
reduce the use of electrical appliances
take less private car .
stop wasting
深圳市建文外国语学校高二年级16班同学们具有高度的社会责任感和环境保护意识。学校下周将举办一个主题为“Clear Waters and Lush Mountains Are as Valuable as Gold and Silver”的英文演讲比赛，你准备一篇演讲稿参赛，内容包括：
1.你对本次比赛主题的理解；
2.举例说明问题(1-2个）；
3.号召全校同学行动起来贡献自己的一份力量(措施2-3个）。
Good morning, everyone.
It’s my great honor to give a lecture here on “Clear Waters and Lush Mountains Are as Valuable as Gold and Silver”.
President Xi’s words reminds us that we should... With the development of modern industry, ....（问题）
Therefore, . It’s our duty to...(措施)
Show Time !
Human
nature
Summary
chaos
conservation
harmony
Macquarie Island
Homework : Polish your writing ！