外研版（2019）选择性必修第二册Unit 5 A Delicate World Starting Out P49 课件(共14张PPT，内嵌视频)
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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 P49 课件(共14张PPT，内嵌视频) |  | |
| 格式 | pptx | ||
| 文件大小 | 43.2MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-07-15 12:15:25 | ||
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(共14张PPT)
Unit 5 A Delicate World
Starting Out P49
新外研选择性必修Book 2
Learning objectives
In this class, you will
learn about what an ecosystem is;
watch a video about human and ecosystem and then answer specific questions;
look at some satellite images about Aral Sea and talk about the changes;
work in groups to discuss the importance of ecological balance.
What is an ecosystem
Before-viewing
An ecosystem is a community or a group of living organisms that live in and interact with each other in a specific environment.
Watch the video: Connected Together
While-viewing
1. Are humans part of Earth's ecosystems Why
2. In what ways can humans affect ecosystems
Yes. Humans are part of Earth's ecosystems. Because all the living things live in ecosystems and people are living things.
Humans can affect ecosystems in positive and negative ways. For example, to have a positive influence on ecosystems, people can plant trees, feed and protect animals, recycle things, etc.
However, deforestation, air and water pollution and excessive waste affect ecosystems in a negative way.
Answer the questions after watching.
Read and guess.
It is situated in Central Asia, between Kazakhstan to the north and Uzbekistan to the south.
It was once the world's fourth largest lake, and contained 10 grammes of salt per litre.
It's ...
Aral Sea
Post-viewing
1990
2000
2010
Satellite Images of Aral Sea, Central Asia
1990
2000
2010
What is happening to the area according to the satellite images
Aral Sea is becoming smaller and smaller / shrinking.
1990
2000
2010
What do you think a later satellite image would show
The water area will be smaller.
1990
2000
2010
What do you think caused these changes
drought
irrigation
canals
...
Post-viewing
Work in groups. Discuss the following questions.
1. Why is ecological balance important
Species and ecosystems provide essential goods and services upon which human well-being depends. They support our health, our environment and our economies.
Post-viewing
Work in groups. Discuss the following questions.
2. Draw a flow chart to show in what aspects human activities interact with ecological enviroment.
Human activities
Industry
...
Wastes/pollutants
Air pollutant
...
Enviroment
Water
...
Thank you!
Unit 5 A Delicate World
Starting Out P49
新外研选择性必修Book 2
Learning objectives
In this class, you will
learn about what an ecosystem is;
watch a video about human and ecosystem and then answer specific questions;
look at some satellite images about Aral Sea and talk about the changes;
work in groups to discuss the importance of ecological balance.
What is an ecosystem
Before-viewing
An ecosystem is a community or a group of living organisms that live in and interact with each other in a specific environment.
Watch the video: Connected Together
While-viewing
1. Are humans part of Earth's ecosystems Why
2. In what ways can humans affect ecosystems
Yes. Humans are part of Earth's ecosystems. Because all the living things live in ecosystems and people are living things.
Humans can affect ecosystems in positive and negative ways. For example, to have a positive influence on ecosystems, people can plant trees, feed and protect animals, recycle things, etc.
However, deforestation, air and water pollution and excessive waste affect ecosystems in a negative way.
Answer the questions after watching.
Read and guess.
It is situated in Central Asia, between Kazakhstan to the north and Uzbekistan to the south.
It was once the world's fourth largest lake, and contained 10 grammes of salt per litre.
It's ...
Aral Sea
Post-viewing
1990
2000
2010
Satellite Images of Aral Sea, Central Asia
1990
2000
2010
What is happening to the area according to the satellite images
Aral Sea is becoming smaller and smaller / shrinking.
1990
2000
2010
What do you think a later satellite image would show
The water area will be smaller.
1990
2000
2010
What do you think caused these changes
drought
irrigation
canals
...
Post-viewing
Work in groups. Discuss the following questions.
1. Why is ecological balance important
Species and ecosystems provide essential goods and services upon which human well-being depends. They support our health, our environment and our economies.
Post-viewing
Work in groups. Discuss the following questions.
2. Draw a flow chart to show in what aspects human activities interact with ecological enviroment.
Human activities
Industry
...
Wastes/pollutants
Air pollutant
...
Enviroment
Water
...
Thank you!