资源简介

(共22张PPT)
Unit 1 Nature in the balance
Reading The Amazon rainforest:
a natural treasure
Warm up
Can you guess where the place is in the video
According to the text’s title, can you predict what aspects the text may talk about
Prediction
Read carefully to complete part A1 on page 4 with the main idea of each paragraph.
Para. 1: Introduction to the Amazon rainforest
Para. 2: Basic information about the rainforest
Para. 3: _________________________________________
Para. 4: _________________________________________
Para. 5: _________________________________________
_________________________________________
Plant biodiversity:levels of the rainforest(plants)
Animal biodiversity:food chain(birds and animals)
The rainforest’s value to the human race; threats to the rainforest
Fast Reading
Fill in the blanks with the figures
____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%
What is the purpose of using so many figures
To provide specific and accurate information
To support the statement and make the statement more persuasive and convincing;
To make people realize the importance of the rainforest in a direct way
01
02
03
Read para 1 carefully and try to find 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.
Detailed-Reading
The documentary script compares the size of the Amazon rainforest with that of China;
The documentary script compares the length of the Amazon River with that of the Yangtze River.
Para 2 uses comparisons, find the targets of comparisons and understand its function.
While the reader may find a large figure too abstract to understand, making comparisons with familiar places or objects will help them gain a better understanding.
the tops of the tallest trees
a system of roots beneath the ground
towering ancient hardwoods
the mass of leaf litter
shorter plants with large leaves
Read para. 3 and figure out different layers of the forest.
The forest’s different levels support an unbelievable variety of wildlife.
bottom
vertical
top
jaguars
At least 87 species, including frogs
Insects
Leaves and fruit
Microorganisms
Nutrients in the earth
Read Para 4 and complete the following chart about the food chain in the rainforest.
Why Amazon rainforest has the richest biodiversity in the world
the richest biodiversity
Text here
different plant levels
complicate food chains
provide food and nutrients
offer places to live (habitat)
01
Thus, it is often known as the “lungs of the planet”. What does “it” refer to in Line31 How do you understand the sentence
02
What is your answer to the question at the end of the script
Can we afford to damage the “lungs of the plant”
Read para 5 and discuss the following questions
1. It refers to the Amazon rainforest. The sentence uses metaphor, which compares the Amazon rainforest to the lungs of the Earth. As is known to all, human beings can’t survive without the organ of lung; in the same way, our earth can’t give birth to life without the Amazon rainforest because it produces over 20% of all the Earth’s oxygen. The sentence emphasizes the Amazon rainforest’s irraplaceable role in our planet.
2. 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 our society with food and medicine. To protect the rainforest is to protect ourselves.
Why the Amazon rainforest has disappeared so quickly over the past 50 years
Post Reading
Critical thinking
In the process of reclamation(垦荒), people cut down tress and set fire on them as well as overgraze cattle;
As global precipitation(降雨量) decreases and the climate is getting drier, the forests survive harder than before.
Brazil accounts for 60% of the Amazon rainforest, but Brazil’s economic development depends mainly on agricultural products exports. So Brazil sacrifices(牺牲) the Amazon rainforest for the economic interests.
01
02
03
What if the Amazon rainforest disappeared
What can we do to protect the Amazon rainforest
The authorities should enforce revelant laws on prohibiting the illegal cutting of trees;
The authorities should set up nature reserves and increase the number of forest rangers(护林者) to guard the rainforest;
Discussion
3
The local government should adjust economic structure by developing spin-offs(副产品) and tourism to earn profits;
4
School, social media and the whole society should educate citizens to increase the awareness of the Amazon rainforest protection.
5
The surroun ding countries should construct buffer zones (缓冲区) and plant man-made forests to slow down the disappearance of the Amazon rainforest;
What’s the purpose of this passage
To introduce the basic information of the rainforest.
01
To stress the Amazon rainforest’s significance to all the life on the Earth.
02
To call for people to make joint efforts to protect the natural treasure—— the Amazon rainforest.
03
Save the earth, our only home.
Thank You

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