牛津译林版（2020）必修第三册 Unit 1 Nature in the balance Welcome to the unit & Reading 课件(共19张PPT)

(共19张PPT)
Welcome to the unit
& Reading (I)
Unit 1 Nature in the balance
Lead-in
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.
—Fredrich Engels
但是我们不要过分陶醉于我们人类对自然界的胜利。对于每一次这样的胜利，自然界都对我们进行报复。
Welcome to the unit
Listen to the song!
Welcome to the unit
1.What is the message(要旨) of the song
Humans have done much harm to the Earth, and we have to take action to change this situation.
Find out the wrong behavior in the picture.
noise
pollution
heavy smoke
clear-cut
logging
smoking
shooting birds
littering on the ground
wasting water
letting off off-gas
pouring out
waste water
排放废水
littering into the water
往水里丢垃圾
清场伐木
排放尾气
随地乱扔
2. What can you do to protect the environment
Save water
Clean energy
Plant more trees
Environmental transportation
Forbid people to cut down trees
Welcome to the unit
The Amazon rainforest: a natural treasure
1. What does the passage mainly talk about
2. What is the genre of the article
The Amazon rainforest
Exposition
Pre-reading
Passage Structure Analysis
Introduction
Basic information
Different levels
Food chain
Human impact
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
Complete part A1 on page 4 with the main idea of each paragraph.
Fast reading
Fast reading
Read the documentary script again carefully and fill in the blanks with the figures.
Fast
reading
6,400
6 million
8
17%
20%
400
40,000
1,300
Detailed reading
Read para. 3 and figure out different layers of the forest.
a system of roots
the mass of leaf litter
shorter plants with large leaves
towering ancient hardwoods
the tops of the
tallest trees
Jaguars
Insects
At least 87 species, including frogs
Leaves and fruit
Microorganisms
feed on
break down
feed on
feed on
Detailed reading
Read para. 4 and figure out the food chain of a jaguar.
In pairs, discuss the following questions.
1. What makes the Amazon rainforest a
natural treasure according to the script
2. What is your answer to the question at
the end of the script Support your
opinion with information from the script
or other sources.
1. What makes the Amazon rainforest a
natural treasure according to the script
The Amazon rainforest is unique, beautiful and 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. What is your answer to the question at
the end of the script Support your
opinion with information from the script
or other sources.
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.
Possible answer: The Three Parallel Rivers of Yunnan Protected Areas (云南三江并流保护区) is a natural property consisting of 15 protected areas. The property is of outstanding value for its diversity of landscapes and rich biodiversity. In its 15 different protected areas, there are over 6,000 plant species, around 200 mammal species and more than 400 bird species. A large number of rare animals such as Yunnan golden monkeys, snow leopards and black necked cranes can be found here.
Are there any places with rich biodiversity like the Amazon rainforest in China What are they Introduce one to the class.
Homework
1. Exercises on Page 5;
2. Introduce places in China with rich biodiversity like the Amazon rainforest.