外研版（2019）选择性必修 第二册Unit 5 A delicate world Starting out 课件（共15张PPT,内镶嵌视频）
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| 名称 | 外研版（2019）选择性必修 第二册Unit 5 A delicate world Starting out 课件（共15张PPT,内镶嵌视频） |  | |
| 格式 | pptx | ||
| 文件大小 | 51.6MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-10-28 21:20:00 | ||
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Unit 5 A Delicate World
Starting out
1. Analyse the reasons why the changes of Aral Sea’s satellite images happened;
2. discuss the actions we can take to protect our earth;
3. realise that we should be in harmony with nature.
Learning objectives
What is an ecosystem?
How many ecosystems do you know?
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
New expressions.
A wonderful serenity has taken possess
tundra /'t?ndr?/ 冻原
glassland 温带草原（接近苔原）
steppe 温带草原（树少的）
A wonderful serenity has taken possess
taiga /'ta?ɡ?/ 北方针叶林
prairie /?pre?ri/ 北美草原
intertidal zone /?nt?'ta?d?l/潮间带
A wonderful serenity has taken possess
savannah /s?'v?n?/大草原
desert /?dez?t/
subtidal zone /s?b'ta?dl/潮下带
Activity 1 New expressions. (6min)
A wonderful serenity has taken possess
continental shelf 大陆架
tropical rain forests
wetlands
A wonderful serenity has taken possess
deep ocean zones
Artic ice packs 北极浮冰
A wonderful serenity has taken possess
estuary /?estju?ri/ 港湾
temperate rain forests温带雨林
marine mud flat海洋泥滩
deciduous forests /d??s?dju?s/落叶林
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
Look at the satellite images and add some information of Aral Sea. (3min)
What is happening to the area according to the satellite images?
Located in Central Asia, between Kazakhstam to the north and Uzbekistan to the south
The fourth largest lake (1960s)
Just four smaller lakes (NOW)
Watch the change of Aral Sea, answer the questions.
Discuss with your groups and draw the map in outline. (5)
What do you think a later satellite image would show? Why?
Global Warming
air pollution
deforestation
desertification
What do you think caused these changes?
Starting out
1. Analyse the reasons why the changes of Aral Sea’s satellite images happened;
2. discuss the actions we can take to protect our earth;
3. realise that we should be in harmony with nature.
Learning objectives
What is an ecosystem?
How many ecosystems do you know?
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
New expressions.
A wonderful serenity has taken possess
tundra /'t?ndr?/ 冻原
glassland 温带草原（接近苔原）
steppe 温带草原（树少的）
A wonderful serenity has taken possess
taiga /'ta?ɡ?/ 北方针叶林
prairie /?pre?ri/ 北美草原
intertidal zone /?nt?'ta?d?l/潮间带
A wonderful serenity has taken possess
savannah /s?'v?n?/大草原
desert /?dez?t/
subtidal zone /s?b'ta?dl/潮下带
Activity 1 New expressions. (6min)
A wonderful serenity has taken possess
continental shelf 大陆架
tropical rain forests
wetlands
A wonderful serenity has taken possess
deep ocean zones
Artic ice packs 北极浮冰
A wonderful serenity has taken possess
estuary /?estju?ri/ 港湾
temperate rain forests温带雨林
marine mud flat海洋泥滩
deciduous forests /d??s?dju?s/落叶林
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
Look at the satellite images and add some information of Aral Sea. (3min)
What is happening to the area according to the satellite images?
Located in Central Asia, between Kazakhstam to the north and Uzbekistan to the south
The fourth largest lake (1960s)
Just four smaller lakes (NOW)
Watch the change of Aral Sea, answer the questions.
Discuss with your groups and draw the map in outline. (5)
What do you think a later satellite image would show? Why?
Global Warming
air pollution
deforestation
desertification
What do you think caused these changes?