牛津译林版（2019）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)
Nature in the balance
Welcome to the unit & Reading
enviromental problem/issue
air pollution
water pollution
soil pollution
noise pollution
harm
A turning point
alarm
What do you think this script is about judging from the title and pictures
Read the documentary script and write 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: ______________________________________
Welcome to the jungle, a huge sea of 大量的 green alive with 生机勃勃 the sounds of animals. This is the Amazon rainforest. As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of 保持...的平衡 the Earth's ecosystem.
The Amazon rainforest crosses into eight countries, including Brazil and Peru, and one overseas region of France, all on the South American continent. With an area of 面积为around 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 在长度上-roughly 大约100 kilometres longer than the Yangtze River. On its journey from the mountains to the ocean, the river supports many different ecosystems. They give this area the richest biodiversity on the Earth: one in ten known species in the world can be found here.
Para.2
8
6 million
6,400
Of the 390,000 plant species known to us, more than 40,000 can be found in the Amazon. This tall and ancient brazil nut tree produces nuts that we can eat; these water lilies are big enough to lie down on 躺在...上. The forest's different levels support an unbelievable variety of 各种各样的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 of 由...组成shorter plants with large leaves. Then there are the towering ancient hardwoods, and finally the tops of the tallest trees many metres above the ground. Each level of the forest forms its own little world, home to different kinds of living things生物.
water lily
brazil nut tree
Para.3: Plant ; of the rainforest
biodiversity
levels
8
6 million
6,400
40,000
The forest's different levels.
Para.3
At the bottom
Above
The next level
Then
Finally
a system of roots
the mass of leaf litter
shorter plants with large leaves
the towering ancient hardwoods
the tallest trees many
metres above the ground
More than 1,300 species of birds and over 400 species of mammals hide among the jungle's plant life, This jaguar is one example. It has a yellowish-brown coat with black spots. While a significant number of jaguars survive here, they are only one element of this forest's food chain. They feed on 以...为食 at least 87 species, including frogs. These frogs, in turn转而, feed on insects which eat leaves and fruit. When a jaguar dies, a tiny army of 一批 microorganisms helps break down分解 its body and return the nutrients to the earth.
Para.4: biodiversity; chain.
animal
food
40,000
1,300
400
jaguars
insects
at least 87 species, including frogs
leaves and fruit
microorganisms
feed on
break down
feed on
eat
nutrients
return
Para.4
The Amazon rainforest breathes life into 注入活力the planet by fixing carbon and producing over 20 percent of all the Earth's oxygen. Thus, it is often known as 被称做 the “lungs of the planet". Moreover, the Amazon rainforest is a treasure house 宝库 of species that can be used for food or medicine. Yet there is one major danger to these irreplaceable plants and animals: us. Over the past 50 years, about 17 percent of the rainforesth as disappeared due to human activities such as agriculture and cattle farming 养牛. As the impact of human activities continues to grow and the list of species in danger of extinction becomes longer, we are left with a question: can we afford to 负担得起做某事 damage the “lungs of the planet"
Para.5: The rainforest’s to the human race;
to the rainforest.
value
threats
20%
17%
the Amazon River
biodiversity
plant species
levels
mammals
food chain
oxygen
food or medicine
human beings
agriculture