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Authoritative PPT Summary
"Energy and the Sun" Energy PPT
Part One: The information coal brings to us
Analyzing the information coal brings us, what inferences can be made about the formation of coal?
We can often see traces of plant branches and leaves on coal blocks. In some coal seams, coal with a complete tree trunk shape is even found.
Coal may have been made from plants.
Buried coal is mostly embedded in rock formations formed from ancient sedimentary sediments.
Coal is buried layer by layer underground.
Coal is formed during sedimentation.
Energy and the Sun PPT, Part 2: Solar energy stored for hundreds of millions of years
The formation process of coal
Billions of years ago, vast forests grew on the earth. In low-lying areas such as lakes and swamps, plants live and die, accumulate in large quantities, and are gradually buried by sand.
As time goes by, more soil and sand accumulate, and the plants are buried deeper and deeper, cut off from the air. Under the combined effects of long-term pressure and high temperatures, plants slowly turn into coal.
According to a lot of evidence, oil and natural gas are similar to coal. They were formed by a large number of lower organisms hundreds of millions of years ago through long-term and complex changes.
Where does the energy of coal, oil, and natural gas come from? How do they relate to solar energy?
Plants perform photosynthesis and convert solar energy into biological energy and store it in their bodies. The food of animals is ultimately plants, so the energy possessed by ancient animals and plants came from solar energy.
Ancient animals and plants were buried underground and turned into coal, oil and natural gas, so the energy of coal, oil and natural gas ultimately came from the sun.
Energy and the Sun PPT, Part 3: Save Energy and Find New Energy
Will coal, oil and natural gas be used up?
Coal, oil, and natural gas are non-renewable energy sources. The less we use, the less we use them. We are running out of these energy sources.
Geothermal Energy
There are two main methods of utilizing geothermal energy: geothermal power generation and geothermal heating. The basic principle of geothermal power generation is the same as that of general thermal power generation, which is to use thermal energy to generate electrical energy through the intermediate conversion of mechanical energy.
Tidal energy
Tides contain a lot of energy. The principle of tidal power generation is similar to that of general hydropower generation. It uses the water level difference between the rise and fall of sea water to drive the turbine to generate electricity.
solar energy
Solar energy is a huge energy source. Solar water heaters, solar power stations, and solar cells are devices that directly convert solar energy into thermal energy and electrical energy for utilization.
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For more information about the "Energy Energy and the Sun" PPT courseware, please click on the Energy PPT Energy and the Sun PPT tab.
"Energy and the Sun" Energy PPT teaching courseware:
"Energy and the Sun" Energy PPT Teaching Courseware Part One: Introduction of New Lessons Coal, oil and natural gas are often used in our daily production and life. The fact that they can do so much work for us shows that they contain huge energy, so...
"Energy and the Sun" Energy PPT download:
"Energy and the Sun" Energy PPT Download Part One: New Lesson Exploration Among the energy we use, coal, oil, and natural gas are important energy sources. Why are they hidden deep underground and how were they formed? By observation: Plants can often be seen on coal...
"Energy and the Sun" Energy PPT courseware 3:
"Energy and the Sun" Energy PPT Courseware 3 Among the energy we use, coal, oil, and natural gas are important energy sources. Why are they hidden deep underground and how were they formed? Let’s talk about it. Taking coal as an example, where do students think the energy contained in coal comes from? I..