牛津译林版（2019）必修 第三册Unit 1 Nature in the balance Reading课件(共17张PPT，内嵌视频)

(共17张PPT)
Unit 1 Nature in the balance
Reading (II)
Step 1 Lead-in
1. is a steep-sided（有陡峭边缘的） canyon（峡谷） carved by the Colorado River in Arizona, the United States which is 277 miles long and 18 miles wide.
2. is the largest waterfall（瀑布） in the world. Located on the border of Zambia and Zimbabwe, the fall forming pool on its edge is popularly known as Devil swimming pool.
3. located in the Sub-range of Himalaya is designated as the world’s highest point on earth from the sea level(水平).
4. also known as Amazonia or Amazon is a forest that covers most of the Amazon basin （盆地）of South America.
The Grand Canyon
Victoria Fall
Mount Everest
Amazon rainforest
Amazon rainforest
What is the script about
Step 2 Prediction
The Amazon rainforest:
a natural treasure
__________
What are the natural treasures
Amazon jungle and the plants and animals are to Amazon rainforest.
valuable
Amazon rainforest
the world.
introduction
Basic information
location
size
origin
of the name
richest
biodiversity
Step 3 Fast-reading
What’s the main idea of the paragragh
Page 4 A1
Step 3 Fast-reading
Plant biodiversity
levels of the rainforest
Step 3 Fast-reading
animal biodiversity
food chain
Step 3 Fast-reading
value to the human race
threats to the rainforest
Step 3 Fast-reading
Step 4 Reading for specific information
8
6 million
6,400
40,000
1,300
400
20%
17%
Step 4 Carefully-reading
a system of roots
the tops of the
tallest trees
the mass of leaf litter
shorter plants with large leaves
towering ancient hardwoods
The forest’s different levels support an unbelievable variety of wildlife.
nutritions in the earth
At least 87 species, including frogs
Leaves and fruit
Microorganisms
feed on
return
Insects
feed on
feed on
break down
jaguars
Food chain
While a significant number of jaguars survive here, they are only one element of this forest’s food chain.
Why is it known as

lungs of the planet
significant
Dangerous
fix carbon
produce oxygen
species used for food and medicine
What is your answer to the question at the end of the script Can we afford to damage the “lungs of the plant”
Discuss it with your partner.
Step 6 Discussion
Thank you!