资源简介

(共21张PPT)
Unit 1 Nature in the balance
Reading 1
The Amazon rainforest: a natural treasure
Let us not, however, flatter ourselves overmuch on account of our human victories over nature. For each such victory nature takes its revenge on us.
———Friedrich Engels
但是我们不要过分陶醉于人类对自然界的胜利。对于每一次这样的胜利，自然都会对我们进行报复。
———弗里德里希·恩格斯
Pre-reading
What plants or animals do you know about What is special about them
What plants do you know about
What is special about them
Pre-reading
Watch a video
Judging from the title and pictures, What do you think this script is about
Pre-reading—explore the title &pictures
the Amazon jungle and the plants and animals found there. —— natural treasures because they are valuable to the Amazon.
The plants and animals living in the Amazon rainforest are unusual and beautiful. A wide variety of animals depend on the rainforest for shelter and food.
Skim and grasp the main idea
Amazon rainforst
Para. 2
Basic information about the rainforest
Para. 3
Plant biodiversity; levels of the rainforest
Para. 1
Introduction to the Amazon rainforest
Para. 5
Animal biodiversity; food chain
Para. 4
Animal biodiversity; food chain
A1
Detailed reading
Paragraph 1
Question：What is the topic sentence
As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem.
02
01
03
04
06
05
07
08
____countries and one overseas region
Around ______ km2 of forest
About ______km in length
more than _____ plant species
More than _______ bird species
Over ______species of mammals
Over _____of all the Earth’s oxygen produced
About _____ the rainforest lost over the past 50 years
8
6 million
6,400
40,000
1,300
400
20%
17%
Work out figures
Read Paragraph 3 and complete the mind map about different levels of the rainforest.
Detailed reading
The forest’s different levels
the mass of leaf litter
shorter plants with large leaves
towering ancient hardwoods
the tops of the tallest trees
Read Paragraph 4 and complete the following chart about the food chain in the rainforest.
nutrients in the earth
insects
(4)
leaves and fruits
(1)
(2)
(3)
frogs
jaguars
microorganisms
The forest’s food chain
Detailed reading
Mind map
Basic information
location and size
Name: getting its name from (1) ________________
richest (2) ____________
Amazon rainforest
Animals
more than 1,300 species of birds and over 400 species of (5) __________
elements of this forest’s (6) ___________
Plants
more than 40,000 (3) ______________
different (4) _____ of the forest
Significance
fix carbon and producing (7) ________
having species used for (8) __________________
Danger
the major danger: (9) _________________
disappearing due to human activities such as (10) ____________ and cattle farming
the Amazon river
biodiversity
plant species
levels
mammals
food chain
oxygen
food or medicine
us/human beings
agriculture
Discussion
1. What makes the Amazon rainforest a natural treasure according to the script
unique
beautiful
valuable
It contains 10% of all known species on the Earth.
It produces over 20% of the planet’s oxygen.
Its wonderful plant and animal species have enabled humans to make amazing discoveries.
2. In the sentence “Yet there is one major danger to these irreplaceable plants and animals: us.” (Page 3, Lines 33–34) , why “us” is used instead of “human beings” here
emphasize the responsibility
duty
Discussion
Discussion
3. What is your answer to the question at the end of the script
No. The Amazon rainforest is far too important for us to allow it to be destroyed. It helps maintain the balance of the ecosystem and provides the essential object for us to live.
What’s the purpose of this passage
To introduce the basic information of the rainforest.
To appeal to people to protect the natural treasure—— the Amazon rainforest.
How does the documentary script make clear the size of the Amazon rainforest and the length of the Amazon River
Appreciation
Sentences using comparison:
With an area of around 6 million square kilometres, the Amazon rainforest is more than half the size of China.
The Amazon River, from which the rainforest gets its name, is close to 6,400 kilometres in length—roughly 100 kilometres longer than the Yangtze River.”
Appreciation
Here are some expressions used to make comparisons:
倍数+ as large as…
倍数+ larger than
倍数+ the size of…
……
making comparisons with familiar places or objects： gain a better understanding.
large number
Consolidation
The Chinese government recently finalized a plan to set up a Giant Panda National Park(GPNP). ___56___ (cover)an area about three times ___57___ size of Yellowstone National Park, the GPNP will be one of the first national parks in the country. The plan will extend protection to a significant number of areas that ___58___ (be)previously unprotected, bringing many of the existing protected areas for giant pandas under one authority ___59___ (increase)effectiveness and reduce inconsistencies in management.
2022年（新高考I卷）
Covering
the
was
to increase
Summary
根据所读内容在空白处填入1个适当的单词或括号内单词的适当形式。
As the largest rainforest in the world, the Amazon rainforest plays an 1.__________（absolute） significant role in maintaining the fine balance of the Earth's ecosystem.
One in ten known species in the world can 2._____________（find） here. The forest's different levels support an unbelievable variety of wildlife. At the bottom, there is a system of roots beneath the ground. Above that is the mass of leaf litter on the dark forest floor. The next level is made up 3.____________ shorter plants with large leaves. Then there are the 4._____________ （tower） ancient hardwoods, and finally the tops of the tallest trees many metres above the ground.
Many species of birds and mammals hide among the jungle's plant life. For example, while 5.____________ sea of jaguars survive here, they are only one element of this forest's food chain. They feed on at least 87 species, including frogs. These frogs, in turn, feed on insects 6.__________ eat leaves and fruit. When a jaguar dies, microorganisms help break down its body and return the nutrients to the earth.
Yet there is one major danger to these irreplaceable plants and animals: us. Over the past 50 years, about 17 per cent of the rainforest 7.___________ （disappear） due to human activities. As the impact of human activities continues to grow 8._________ the list of species in danger of extinction becomes 9.___________ （long）, we are left with a question: can we afford 10._________（damage） the "lungs of the planet"
absolutely
be found
of
towering
a
which/that
has disappeared
and
longer
to damage
Writing
Write an article to call on people to protect the environment.
Nowadays, a wide variety of wildlife have been in danger of extinction, especially in the Amazon rainforest.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
We, human beings, should assume the responsibility to take active measures to protect our home——the earth.

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