资源简介

(共11张PPT)
A delicate world
The environment where different types of plants, animals and species live
Different kinds of animals and plants in a balanced environment
Ecosystem
Biodiversity
Match the definitions（定义）with the terms (术语)
生态系统
生物多样性
The _______ (more/less) different kinds of living things in the ____________, the more successful it is.
more
ecosystem
Biodiversity
Ecosystem
Non-living things
Living things
Biodiversity
determine
influence
Complete the mindmap
All the living things on the Earth live in ________
What are they on Earth
ecosystems
We can think of an ecosystem as this wooden puzzle game
Ecosystems are a little bit like this game of sticks(游戏棒)
Which figure of speech(修辞手法) is used here
类比
We can think of an ecosystem as this wooden puzzle game
Ecosystems are a little bit like this game of sticks(游戏棒)
What does the writer suggest
The things that live in ecosystems ____________ each other. They are ________
depend on
connected
The whole thing represents an ____________The woods stand for ________ including _________who fit all together and __________ each other to live. If a species go ________, it you disappear from the ecosystem. Losing few of them __________cause too much trouble.
ecosystem
species
humans
depend on
extinct
will not
But losing too many will make the ____________rickety(摇晃的).Humans have to manage the ecosystem extremely ___________. If not, it will _____and there won’t be any place for human beings
ecosystem
carefully
fall
Satellite Images of Aral Sea, Central Asia
What is happening to the area according to the satellite images
Aral Sea is becoming _________ and _________
smaller
smaller
Satellite Images of Aral Sea, Central Asia
2. What do you think a later satellite image would show
3. What do you think caused these changes
Global Warming
air pollution
deforestation
desertification

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