"Solar Energy" Energy and Sustainable Development PPT Courseware 3

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"Solar Energy" Energy and Sustainable Development PPT Courseware 3

1. The sun - a huge nuclear furnace

The sun is 150 million kilometers away from the earth, its diameter is about 110 times that of the earth, its volume is 1.3 million times that of the earth, its mass is 330,000 times that of the earth, and its core temperature is as high as 15 million degrees Celsius.

Inside the sun, hydrogen nuclei fuse at ultra-high temperatures, releasing huge amounts of nuclear energy. Hydrogen bomb explosions are happening every moment in the core of the sun, and the sun is like a huge "nuclear furnace."

The surface temperature of the sun is about 6,000°C. The sun has been "burning" stably for nearly 5 billion years and can continue to "burn" for another 5 billion years.

2. The sun is a treasure house of human energy

Only about one billionth of the energy radiated outward by the sun is transmitted to the earth.

The formation of fossil energy

Plants in ancient times converted solar energy into chemical energy in living organisms through photosynthesis.

After the continuous movement of the earth's crust, the bodies of animals and plants after death are buried underground and under the sea.

After millions of years of complex changes, it became coal, oil, and natural gas.

When we mine fossil fuels today, we are actually mining the solar energy that the earth received hundreds of millions of years ago.

3. Utilization of solar energy

There are two main ways to directly utilize solar energy.

1. photothermal conversion

Use collectors to collect energy from sunlight to heat water and other substances. Realized the conversion of solar energy into internal energy.

2. Photoelectric conversion

Solar cells convert solar energy into electricity;

It is widely used in aviation, aerospace, transportation, communications and other fields.

solar energy

The Sun - a huge "nuclear energy furnace": Large-scale fusion is taking place inside the sun, and the released nuclear energy is radiated from the sun in the form of electromagnetic waves. Creatures on the earth enjoy the energy released by fusion every day.

Utilization: (1) Four channels for utilizing solar energy: The first is to convert and store solar energy through the photosynthesis of plants and then release it in the form of fuels such as vegetation, biogas, coal, petroleum, and natural gas; the second is to use the atmosphere and The rising cycle of water is then released through wind, flowing water, waves, ocean currents, etc.; the third is absorbed by the ocean and becomes ocean internal energy; the fourth is directly utilized by people, such as solar water heaters. (2) Three ways to directly utilize solar energy: First, directly convert solar energy into internal energy. The second is to convert solar energy directly into electrical energy. The third is to directly convert solar energy into chemical energy.

practise

1. The fossil energy we use mainly comes from ( )

2. Solar energy comes from ( )

A. The burning of chemical fuels in the sun itself

B. Fission C. Chain reaction D. Fusion

3. Which of the following uses solar energy ( )

A. Microwave oven B. Solar cooker C. Photovoltaic cell D. Electric water heater

4 As shown in the picture is a solar LED lighting street light. It is mainly composed of solar panels, LED lamp holders and other parts. LED is a light-emitting diode that can emit light through current and can directly convert electrical energy into _____ energy. Solar energy is _______ energy (please fill in "primary" or "secondary"), clean and pollution-free. It is nuclear energy released when hydrogen nuclei undergo _________(fill in "fission" or "fusion") inside the sun. .

Keywords: Energy and Sustainable Development Teaching Courseware, Solar Energy Teaching Courseware, New People's Education Edition Ninth Grade Physics PPT Courseware, Ninth Grade Physics Slide Courseware Download, Energy and Sustainable Development PPT Courseware Download, Solar Energy PPT Courseware Download, .ppt format

For more information about the "Energy and Sustainable Development of Solar Energy" PPT courseware, please click the Energy and Sustainable Development ppt Solar Energy ppt tag.

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Update Time: 2024-09-26

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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