牛津译林版（2019）必修第三册Unit 1 Nature in the balance Reading课件（17张ppt）

(共17张PPT)
Unit 1
Nature in the balance
Pictures
Question：
Question: Can man rule nature
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
Listen to the song
The human race has done much harm.
We have polluted our soils and seas,
And cut down too many trees.
Now is the time to sound the alarm.
We want to live in a world that’s clean;
We want to live in a world of green.
The human race has done much harm;
Now is the time to sound the alarm.
Let’s be thankful for the skies above;
Let’s plant new trees and stop pollution;
Let’s work together to find the solution;
The Earth’s our home to protect and love.
We want to live in a world that’s clean;
We want to live in a world of green.
Let’s be thankful for the skies above;
The Earth’s our home to protect and love.
Questions
What is the message of the song ？
What can you do to help protect the environment
Prediction
What will be talked about in the text according to the title and the picture
The Amazon rainforest: a natural treasure
What plants or animals do you know about What is special about them
Fast reading
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
Animal biodiversity; food chain
The rainforest’s value to the human race; threats to the rainforest
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%
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.
Detailed reading
Paragraph 2
Q1： How does the Amazon rainforest
get its name
Q2: What gives this area the richest
biodiversity
Detailed reading
Paragraph 3
Please complete the table about the forest’s different levels.
up
bottom
The tops of the tallest trees.
The towering ancient hardwoods
Shorter plants with large leaves
The mass of leaf litter
A system of roots beneath the ground
Detailed reading
Paragraph 4
Please complete the following chart about the forest’s food chain.
jaguars
Nutrients in the earth
Leaves and fruit
insects
frogs
microorganisms
Detailed reading
Paragraph 5
Q1: How does the Amazon rainforest
breathe life into the planet
Q2: Why has 17 per cent of the rainforest
disappeared over the past 50 years
Discussions
What makes the Amazon rainforest a natural treasure according to the script？
The Amazon rainforest is unique, beautiful and valuable. It contains almost 10% of all known species on the Earth. It produces over 20% of the planet’s oxygen. Its wonderful plant and animal species have enable humans to make amazing discoveries.
Discussions
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.
Discussions
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.