"The Sun and Humanity" PPT Courseware 2

Description

"The Sun and Humanity" PPT Courseware 2

The sun is the closest star to us and affects all living things on earth. So in this lesson, we will explore and summarize the impact of the sun on human beings from multiple angles.

Reading during the day

During the day, sunlight provides us with light. But it should be noted that reading under strong sunlight is harmful to vision.

The relationship between the sun and humans

Only with the sun can plants grow and provide a variety of food for humans.

With the sun and plants, animals developed and provided humans with a variety of meat and egg foods.

People's lives are inseparable from electricity

Lighting, television, and computers are just a few of the ways people use electrical energy. The main sources of electric energy are thermal power (coal), hydropower, and wind power. The coal required for thermal power, the running water required for hydropower, and the wind required for wind power are all related to the sun. Nuclear power is only a small part of the electricity supply.

Transportation

The driving of cars, flying of airplanes, and almost all means of transportation are inseparable from dependence on oil. The formation of oil is that green plants on the earth convert solar energy into chemical energy in the plants through photosynthesis and store it, providing humans and various animals with the energy they need to survive. Energy sources such as coal, oil, and natural gas are essentially solar energy accumulated by organisms in geological historical eras.

In the final analysis, people's clothing, food, housing and transportation are closely related to the sun.

Human food comes from plants and animals.

People directly use solar energy for light and heat. Solar cells and solar water heaters are being widely used in people's lives, bringing convenience to people's lives.

In summary:

The influence of the sun on humans is realized in the form of light and heat.

The sun mainly transmits energy to the earth in the form of light and heat. The energy irradiated onto the earth every second is equivalent to the energy produced by the burning of 5 million tons of coal. These energies exist in nature in the form of coal, oil, natural gas and other energy sources, or in the form of wind energy and water energy. Therefore, the form of realization of the sun's influence on human beings is ultimately the conversion of energy. From the perspective of energy conversion, the complex relationship between the sun and humans ultimately comes from solar energy.

The sun is so important to human activities, survival and development! Can anyone tell me what would happen to humans on earth if there was no sun?

1. Without the sun, there would be no growth of animals and plants. Without the growth of animals and plants, there would be no formation of coal, oil, natural gas and other energy minerals. Without energy minerals, human aircraft would not be able to fly because there is no gasoline.

2. Without the sun, there would be no evaporation of water. Without the evaporation of water, there would be no water cycle in nature. Without the water cycle, there would be no water in high-altitude places on the earth. If there is no water flowing down from high places, running water cannot be used to generate electricity. Without electricity, humans cannot use electrical appliances.

3. Without the sun, the air will not be heated. If the air is not heated, it will not expand and become lighter. If the air does not become lighter, it will not rise. If the air does not rise, there will be no wind. Without wind, the wind turbine cannot work.

Knowledge expansion

While the sun brings benefits to humans, it also creates some minor troubles for humans.

In 1940, there was a telegraph operator named Brooke in the German Army Command. When he was performing a mission in World War II, communications were suddenly interrupted and the information was blocked, which delayed the fighter planes and led to the failure of the battle. Brooke was sentenced to death by a military court.

This year we often experienced signal interruptions when watching CCTV programs.

When sunspots are high, they can cause interference to radio signals on Earth.

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"The Sun and Humanity" PPT courseware:

"The Sun and Humans" PPT courseware The relationship between the sun and humans The sun is the nearest star to us, and it affects all living things on the earth. So in this lesson, we will explore and summarize the impact of the sun on human beings from multiple angles. Take a look and discuss...

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Update Time: 2024-07-06

This template belongs to science courseware E-education edition sixth grade science volume 2 industry PPT template

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