Science Edition for Sixth Grade Science Volume 1

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"Energy and the Sun" Energy PPT teaching courseware

Part 1: Importing 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. Where does such a large amount of energy come from? In this lesson we will study the generation of these energies.

Energy and the Sun PPT, Part 2: New Lesson Learning

Coal is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus. The sum of carbon, hydrogen and oxygen accounts for more than 95% of organic matter. It is a very important energy source and an important raw material for the metallurgical and chemical industries. There are several categories of lignite, bituminous coal, anthracite, and semi-anthracite.

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. Buried coal is mostly embedded in rock formations formed from ancient sedimentary sediments. Coal is buried layer by layer underneath.

In addition to these, what other information do you know that coal brings to us?

solar energy

Generally refers to the radiant energy of sunlight, which is generally used to generate electricity in modern times. Since the formation of the earth, living things have mainly survived on the heat and light provided by the sun. Since ancient times, humans have also known how to use sunlight to dry objects and use it as a method of preserving food, such as making salt and drying salted fish. However, with the reduction of fossil fuels, we are interested in further developing solar energy. There are two ways to utilize solar energy: passive utilization (photothermal conversion) and photoelectric conversion. Solar power is an emerging renewable energy source. Solar energy in a broad sense is the source of many energies on the earth, such as wind energy, chemical energy, potential energy of water, etc.

The relationship between coal, oil, natural gas and solar energy

Coal, oil and natural gas all store solar energy. Oil is made from ancient organic matter. During the long geological time, a large number of marine organisms have reproduced in the ocean. Their dead remains sank to the seabed along with the sand, and accumulated layer by layer over the years, isolated from the outside air. After being decomposed by bacteria, and Under the action of high temperature and high pressure in the formation, biological remains gradually decompose and transform into oil and natural gas. Coal is derived from ancient plants.

At that time, after a large number of ferns died, the remains sank into the water and were buried deep underground. Due to the action of anaerobic bacteria (microorganisms that do not like oxygen) and the undulating movement of the earth's crust, the contents of hydrogen, oxygen, and nitrogen slowly decreased. , the carbon content increases relatively, and the plant remains gradually turn into peat, lignite, bituminous coal, and even anthracite. Coal, oil and natural gas were formed by ancient animals and plants and are all products of solar energy.

Energy and the Sun PPT, Part 3: Conclusion Summary

The energy contained in coal, oil and natural gas is solar energy that has been stored for hundreds of millions of years. They are closely related to our lives because they are non-renewable. Therefore, we must save energy and develop new energy sources.

Energy and the Sun PPT, Part 4: Classroom Exercises

(1) Fill in the blanks

1. Most of the energy we use comes from ( ), and we have directly converted solar energy into ( ).

2. Among the energy we use now, ( ), ( ), ( ) are the most important energy sources.

(2) Judgment questions

1. Among the energy we use, coal, oil, and natural gas are the most important energy sources. ( )

2. Coal was transformed from ancient lower organisms. ( )

3. Oil, coal, and natural gas are inexhaustible. ( )

Energy and the Sun PPT, Part 5: Homework Arrangements

After class, relevant information will be collected and a knowledge exhibition will be held on the relationship between coal, oil and natural gas and human beings.

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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 tag.

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Update Time: 2024-09-30

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