"What's inside the Earth" PPT download

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"What's inside the Earth" PPT download

Part One: Describe the composition of the Earth’s interior

The Earth can be viewed as consisting of a series of concentric layers. Inside the Earth, there are core, mantle, and shell structures. Outside the Earth, there are the hydrosphere, atmosphere, and magnetosphere, which form the outer envelope surrounding the solid Earth. The magnetosphere and atmosphere block ultraviolet rays, X-rays, high-energy particles and numerous meteors from space from directly bombarding the ground.

More than seven-tenths of the earth's surface is covered by blue ocean, and lakes and rivers only account for a small part of the earth's surface water. The liquid water layer on the earth's surface, called the hydrosphere, has been formed for at least 3 billion years. The surface of the earth is composed of various rocks and soils. The ground is rugged. The low-lying parts are submerged by water and become oceans and lakes. The land above the water surface consists of plains and mountains. The total vertical fluctuation of the earth's solid surface is about 20 kilometers. It is the height between the top of Mount Everest (according to the determination of the Chinese mountaineering team, the altitude of Mount Everest is 8844.43 meters) and the deepest ocean depth (the depth of the Mariana Trench is about 11 kilometers). Poor, it is more than half the average thickness of continental crust. The ocean floor is as uneven and uneventful as land. Ocean floor rocks are much younger than those on land. Most rocks on land are less than two billion years old. Sedimentary rocks can be found everywhere on land, indicating that these places may have been oceans in ancient times. Although there are a small number of craters on the earth's surface, it is difficult to find as many craters as the moon, Mars and Mercury. This is because the earth's surface is constantly weathered, eroded and disintegrated by external forces (water and atmosphere) and internal forces (earthquakes and volcanoes). result.

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"What's Inside the Earth" PPT courseware download:

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"What's inside the Earth" PPT courseware Part One: Inside the Earth So do you want to know what's inside the Earth? Let’s use pictures to guess what’s inside the earth? Earth's core: the core part, 3,400 kilometers thick, with a temperature of about 4,700°C. Earth's crust: made of solid...

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Update Time: 2024-10-30

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