"Ocean - Hope of the 21st Century" PPT courseware

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"Ocean - Hope of the 21st Century" PPT courseware

Do you know the ocean, have you seen the ocean, do you understand the ocean?

Why is the ocean the hope of mankind in the 21st century?

The ocean is a "blue treasure house". If the seawater on the entire earth is refined, 5.5 million tons of gold, 400 million tons of silver, 4 billion tons of copper, and 13.7 billion tons of iron can be obtained... It can be said that everything on land is found in the ocean, and the ocean also contains Many rare elements are found in small amounts on land and are difficult to extract.

Among the various chemical elements and minerals contained in seawater, table salt is the most abundant. The world now produces 500 million tons of sea salt every year. If consumed at this rate, the salt in the ocean would last 500 million years.

Self-reading and thinking

What is the reason that makes human beings in the 21st century no longer "lazy"?

As human society enters the 21st century, in what aspects will it develop and utilize the ocean?

1. Develop marine mineral resources

2. Ask for high-protein food from the ocean

3. Use seawater movement to generate electricity

4. Desalinate seawater to alleviate water shortages

5. Build undersea cities and open up human living space.

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For more information about the "Hope of the Ocean in the 21st Century" PPT courseware, please click the "Hope of the Ocean in the 21st Century" ppt tag.

"Ocean - Hope of the 21st Century" PPT courseware 3:

"Hope of the Ocean in the 21st Century" PPT Courseware 3 Awe Threat Scarcity Generosity Price Contains Energy Crisis Look at the ocean and sigh endlessly Show your power... Generosity has two meanings, one is full of righteousness and passionate emotions; It means being generous and not stingy..

"Ocean - Hope of the 21st Century" PPT courseware 2:

"Hope of the Ocean in the 21st Century" PPT Courseware 2 The ocean is a blue treasure house. If the seawater on the entire earth is refined, 5.5 million tons of gold, 400 million tons of silver, 4 billion tons of copper, and 13.7 billion tons of iron can be obtained. It can be said that it is available on land and in the ocean, and the ocean...

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Update Time: 2024-11-22

This template belongs to Chinese courseware Jiangsu Education Edition Chinese Language for Sixth Grade Volume 2 industry PPT template

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