"Energy and the Sun" Energy PPT Courseware 3

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"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?

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Taking coal as an example, where do students think the energy contained in coal comes from?

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, dormant silt. Coal is also buried layer by layer underground.

The first bit of information is that coal was probably made from plants.

The second and third points of information are that coal is formed during sedimentation.

The following pictures of ancient forests and the texts in them provide further evidence that "coal may have been made from plants."

This leads to the conclusion that coal is made from plants.

According to a lot of evidence, it is speculated that oil and natural gas are similar to coal and 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?

The energy of coal, oil, and natural gas is actually stored solar energy for hundreds of millions of years.

Summary of knowledge points

1. The energy contained in coal, oil, and natural gas is solar energy that has been stored for hundreds of millions of years.

2. Most of the energy we use ultimately comes from the sun.

2. Multiple choice questions

1. Coal was formed from ( ) hundreds of millions of years ago.

A. Plants B. Lower organisms C. Microorganisms

2. There is a huge amount of energy stored inside the earth ( )

A. Thermal energy B. Electrical energy C. Magnetic energy D. Mechanical energy

3. Which of the following energy sources are renewable energy sources ( )

A. Petroleum B. Coal C. Natural gas D. Wind

4. Which of the following energy sources are new energy sources ( )

A. Atomic energy B. Petroleum C. Coal D. Natural gas

5. Scientists have confirmed that ( ) years ago, the climate on the earth was warm, rainfall was sufficient, and plants grew very luxuriantly.

A. 20,000-30,000 B. 30,000-40,000 C. 200-300 million D. 300-400 million

Test questions in class

1. True or False Questions (mark √ if correct, × if incorrect)

1. Coal can no longer be formed on the earth. ( )

2. The energy contained in coal, oil, and natural gas comes from the sun. ( )

3. Oil is inexhaustible. ( )

4. We must save energy. ( )

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

6. All energy is unlimited. ——( )

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"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:

"Energy and the Sun" Energy PPT Part One Content: The Information Coal Brings Us By 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, and even...

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Update Time: 2024-11-22

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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