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

(共24张PPT)
A delicate world
A delicate world
Understanding Ideas
Unit 5
Unit 5
Please watch a video
Are humans part of Earth’s ecosystems
In what ways can humans affect ecosystems
6p-prepare
Are humans part of Earth’s ecosystems
In what ways can humans affect ecosystems
Leading in
Watch a video and discuss:
Are humans part of Earth’s ecosystems
In what ways can humans affect ecosystems
In positive ways
In negative ways
……
……
Plant trees
Kill animals
Pre-reading
Look at the title and predict the main idea of the passage.
Macquarie Island:
from Chaos to Conservation
Chaos
Conservation
How do humans destroy ecosystems
How do humans build ecosystems
How do humans restore ecosystems
6p-present
While-reading
Skim: Read for structure.
Part 1: para ____
Part 2: para ____
Part 3: para ____
___________ of Macquarie Island
___________ of Macquarie Island
___________ of Macquarie Island
1
beauty
2-3
chaos
4-6
conservation
6p-present
The passage is developed in the order of time.
while-reading
Choose the author’s purpose in writing the passage.
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.
While-reading
Scan part 1 and find the beauty of the island.
I am standing on Macquarie Island, in the South west Pacific Ocean, halfway between Australia and Antarctica. Strong winds and stormy seas have helped sculpt its long, thin shape. The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty. No visitor would think it surprising that the island is a UNESCO World Heritage Site. Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years.
6p-practice
ADD YOUR TITLE HERE
Macquarie Island(麦夸里岛)
Location
Shape
Landscape
Title
Inhabitants
in the ____________Pacific Ocean between ________
_______ and _______ shape caused by _______ wind and ___________
___________ and ________ contrast ___________
a _________ and ________ beauty
________ and _______ penguins, _________
and _________
Australia
Antarctica
Pacific Ocean
South-west
Australia
Antarctica
ADD YOUR TITLE HERE
Macquarie Island(麦夸里岛)
Location
Shape
Landscape
Title
Inhabitants
in the ____________Pacific Ocean between ________
_______ and _______ shape caused by _______ wind and ___________
___________ and ________ contrast ___________
a _________ and ________ beauty
________ and _______ penguins, _________
and _________
South-west
Australia
Antarctica
long
thin
strong
stormy seas
ADD YOUR TITLE HERE
Macquarie Island(麦夸里岛)
Location
Shape
Landscape
Title
Inhabitants
in the ____________Pacific Ocean between ________
_______ and _______ shape caused by _______ wind and ___________
___________ and ________ contrast ___________
a _________ and ________ beauty
________ and _______ penguins, _________
and _________
South-west
Australia
Antarctica
long
thin
strong
stormy seas
green grass
bare rock
dramatically
UNESCO World Heritage Site
royal
king
elephant seals
While-reading
Scan part 2 and finish the blanks.
brought ________
rats&mice
brought ________
cats
brought ________
rabbits
took over the island, eating the birds' eggs and attacking baby birds.
Aim:
Aim:
Aim:
Results
unknowingly
control the rats and mice
food for humans
developed an appetite for the birds
soil erosion
more cats hunting the birds
Results
Results
The end result
parakeets died out in 1891
6p-practice
While-reading
Scan part 3 and finish the mind map.
after the 1970s
in the 1980s
after 2006
measure(s)
result(s)
to remove rabbits
to kill cats
to remove all
release_______
fewer________
but_____ birds
fewer
virus
rabbits
use__________
drop poison
use_______
traps &dogs
dogs
no ____,but more _____,______
land collapse
_____free in 2014
ecology is ________
________
cats
rats
rabbits
pest
on
recovery
6p-practice
Post-reading
Retell the passage based on the mind map.
Macquarie Island(麦夸里岛)
Chaoes
conservation
rats&mice
cats
rabbits
took over the island
developed an appetite
soil erosion
Release virus
Use traps &dogs
drop poison
Use dogs
6p-perform
Post-reading
Think and share
What is your understanding of “... we humans owe it to the island to give it a happy ending”
It is _________ that have damaged the __________ of the Macquarie island and it is humans’ _________ to help it return to ________.
humans
ecosystem
duty
normal
beauty
chaos
conservation
Human
harmony
6p-produce
Post-reading
Think and share
From this story, do you konw how we can avoid similar problems happening Discuss in groups and share your ideas.
* Avoid human intervention.
* Think twice before action while tackling problems.
* Better late then never
* Raise the awareness of protecting nature.
* Keep balanced between development and conservation.
...
6p-produce
Do you want to know about
China’s ecological conservation efforts？
Only to obey nature
in order to overcome nature. ---Charles Darwin
Humans and nature have a close relationship. Nature provides essential resources for human survival and development. However, as society develops, humans have been exploiting natural resources excessively, leading to environmental problems like pollution and climate change. To achieve sustainable development, we must balance economic growth with environmental protection. We need to use resources wisely and reduce waste. Protecting nature is not only about preserving the environment, but also about ensuring a better future for ourselves and future generations.
4月22日是世界地球日，你将代表全体师生演讲，呼吁大家“珍爱地球，保护环境，人与自然和谐共生。”
Cherish the earth,
protect the environment,
and live in harmony with nature
homework-writing
GROUP1
homework-writing
GROUP2
假如你是一名英语导游，带领同学们去参观麦夸里岛。你会怎么介绍呢？