"The Birth of Life" PPT courseware

Description

"The Birth of Life" PPT courseware

Part One: Where does life come from?

Autogenous theory: the belief that life can be produced directly and rapidly from non-living substances at any time (rotten grass produces glaze, rotten meat produces maggots, etc.)

Divine creation theory: All life on earth was designed and created by God.

Cosmogenesis theory: It is believed that life came from other planets, and the spores of certain microorganisms adhered to interstellar dust and reached the earth.

The theory of chemical evolution: Life evolved chemically from non-living substances under special circumstances in early history.

What are the criteria for judging the rationality of scientific speculation?

1. Scientific speculation requires solid evidence, and imagination is untenable.

2. Scientific speculation also requires strict logic and rich association and imagination.

The birth of life PPT, part 2: reading navigation

1. When was the earth created?

2. What was the condition of the primitive earth?

3. What are the components of the original Earth’s atmosphere?

1. Questions raised by Miller’s experiment?

2. What hypothesis was proposed by Miller’s experiment?

3. What did Miller use to simulate lightning on primitive Earth?

4. What gas did Miller input into his experiment?

5. What did the experiment produce?

The birth of life PPT, the third part: the conditions provided by the primitive earth for the origin of life

Material conditions: primitive atmosphere

(carbon dioxide, hydrogen, water, ammonia, methane, no oxygen);

Energy conditions: cosmic rays, ultraviolet rays, lightning, thermal energy;

Site conditions: pristine ocean

The birth of life PPT, Part 4: Thinking and discussion

1.What do the results of the experiment show?

Under certain conditions, components of the original atmosphere may transform into small organic molecules

2. Why did Miller's experiment attract the attention of colleagues?

Because the Miller experiment is considered to have created a new way to study the origin of life

Miller's experiment description:

Under certain conditions, various components in the original atmosphere of the primitive earth can be converted into small organic molecules.

This is the first step in the origin of life!

The birth of life PPT, the fifth part: practice

1. There are obvious differences in composition between the original Earth’s atmosphere and the current air. The composition of the original Earth’s atmosphere was mainly ( )

A. Water vapor, ammonia, methane, etc.

B. Nitrogen, oxygen, water vapor, carbon dioxide, etc.

C. Oxygen, hydrogen, carbon dioxide, etc.

D. Water vapor, oxygen, nitrogen, etc.

2. On the surface of the primitive earth, the basic material of life that was first formed was ( )

A. Small molecular organic compounds

B. Macromolecule organic matter

C. Small molecule inorganic substances

D. Primitive life

3. The place where primitive life was formed is ( )

A. Primitive atmosphere B. Primitive ocean

C. On land D. In the atmosphere

Keywords: Jiangsu Education Edition eighth grade biology PPT courseware free download, birth of life PPT download, .PPT format;

For more information about the "Origin of Life and Biological Evolution and the Birth of Life" PPT courseware, please click on the Origin of Life and Biological Evolution PPT and the Birth of Life PPT tag.

"The Birth of New Life" PPT (second lesson):

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"The Birth of New Life" PPT (first lesson):

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"The Birth of Life" PPT:

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Update Time: 2024-10-19

This template belongs to biology courseware Jiangsu Education Edition 8th Grade Biology Volume 1 industry PPT template

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