"The Evolution of the Earth and the Origin of Life" PPT

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Zhejiang Education Edition Ninth Grade Science Volume 2	pptx	6 MB

"The Evolution of the Earth and the Origin of Life" PPT

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Upload Time: 2024-10-02

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"The Evolution of the Earth and the Origin of Life" PPT

Part One: The Evolution of the Earth

The Earth was formed by the collapse and condensation of the original solar nebula.

The age of the Earth is approximately 4.6 billion years. The solar system was born about 5 billion years ago, and about 500 million years later, the earth began to form.

The Earth was formed as a hot ball of magma.

The temperature dropped and a solid crust formed.

The continuous eruption of high-temperature magma releases water vapor, carbon dioxide, etc. to form the primitive atmosphere.

The evolution of the earth and the origin of life PPT, Part 2: The origin of life

In ancient times, some people proposed that living things are naturally produced from non-living substances, such as "rotten grass turns into fireflies", "rotten flesh gives birth to maggots", etc.

Prove that "carrion breeds maggots" is wrong.

Miller (USA) experiment

Synthesizes amino acids, organic acids, urea, etc.

Primitive living matter can be produced under natural conditions without life, and it is inferred that life evolved on this basis.

Miller's simulation experiments have become a major research method in chemical evolution.

The evolution of the earth and the origin of life PPT, Part 3: Class summary

1. The evolution of the earth

2. The origin of life

Keywords: Free download of science PPT courseware for the second volume of the ninth grade of Zhejiang Education Edition, PPT download of the evolution of the earth and the origin of life, .PPT format;

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"The Evolution of the Earth and the Origin of Life" PPT Courseware Part One: The Evolution of the Earth When the Earth was first born 4.6 billion years ago, did it look the same as it does now? 1. When the Earth was first born, it was a hot ball of molten lava. A fiery ball of magma. think..

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"The Evolution of the Earth and the Origin of Life" PPT