"The Impact of Human Activities on the Biosphere" PPT courseware download

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"The Impact of Human Activities on the Biosphere" PPT courseware download

Part One: Introduction of New Course

So far, the Earth is the only place we have discovered that is suitable for all kinds of life, and it is also the only place suitable for human beings. Humans are not only a member of the biosphere, but also have a greater impact on the future development of the biosphere.

learning target

1. Give examples of the negative impacts of human activities on the biosphere.

2. Participate in discussions and investigations on environmental protection issues to develop environmental awareness.

PPT on the impact of human activities on the biosphere, part 2: new lesson learning

1. Impact of land use on the biosphere

Land is the material basis for human survival. Due to the rapid increase in population, land is under unprecedented pressure.

What is the current situation of land in our country?

Our country now has 134 million hectares of cultivated land, and the per capita cultivated land is only 0.11 hectares, less than half of the world average. The quality of our country's cultivated land is generally not high. Among the approximately 134 million hectares of cultivated land, medium and low fields account for about 90%.

2 Impact of deforestation on the biosphere

The core functions of forests: conserve water sources, maintain soil and water, prevent wind and sand, increase humidity, produce oxygen, purify the air, reduce noise, etc.

consequences of forest destruction

The lack of forest resources has led to the destruction of animal habitats and put many species on the verge of extinction.

3The impact of environmental pollution on the biosphere

Environmental pollution refers to the deterioration of the environment due to the discharge of large amounts of harmful substances produced by human production and life into the environment.

PPT on the impact of human activities on the biosphere, part three: feedback in class

1. The starting point for advocating “no disposable wooden chopsticks” is ( )

A. Reduce solid waste B. Save wood and protect forests

C. Reduce personal financial expenditure D. Change customs

2. What changes may occur to our living environment after severe deforestation ( )

A. Soil erosion B. Climate change

C. Damage to biodiversity D. All of the above can happen

Keywords: Beijing Normal University Edition Biology PPT courseware for seventh grade volume 2 free download, PPT download on the impact of human activities on the biosphere, .PPT format;

For more information about "Man's Responsibilities in the Biosphere and the Impact of Human Activities on the Biosphere" PPT courseware, please click on the "Man's Responsibilities in the Biosphere ppt Impact of Human Activities on the Biosphere" ppt tag.

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"The Impact of Human Activities on the Biosphere" PPT download:

"The Impact of Human Activities on the Biosphere" PPT Download Part One: Introduction of New Lessons So far, the earth is the only place we have found suitable for the survival of various organisms, and it is also the only place suitable for human survival. Humans are not only members of the biosphere, but...

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Update Time: 2024-11-22

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 2 industry PPT template

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