Get Full Essay Get access to this section to get all help you need with your essay and educational issues. Pressure rises steadily inside the earth because of the weight of overlying rock. Therefore ,the Pressure at the outer boundary of the core reaches 1.
The knowledge of Earth plays a crucial role in our lives. Earth is a minute dot in a vast universe of stars, galaxies, and empty space. Satellites can circle right round it in just a few hours. Yet it is still large enough for our understanding of it to be barely elementary. But early in the 19th century, scientists discovered that the age of Earth was immense-now estimated at more than four and a half billion years-and that it has undergone immense changes during its history.
Shape of Earth Earth appears to be flat, but in reality it is almost spherical. It is a little flattened at the poles and bulges out a little at the equator. The Crust of the Earth Some scientists are of the opinion that millions of years ago this earth of ours was a globe of fluid matter and hot gases revolving round the Sun.
In the course of time it radiated its heat into space and its outer portion cooled and solidified. This hard and solid outer portion of earth is called its crust or Lithosphere. Scientists hold different views about the thickness of this crust, but the general view is that, on an average, it is about 50 km thick.
Moreover, the crust is always undergoing changes. It expands contracts and breaks. The crust of earth consists of the following elements: SoU of the Earth The loose material, which forms the upper layer of earth in which vegetations can grow, is called the soil.
The soil consists of clay, sand, humus, etc. The crust of earth or lithosphere is everywhere covered with soil, the depth of which varies from place to place. Soils are mainly of the following types: These are generally confined to river basins and coastal plains.
These are by far the most fertile. These have been deposited by rivers. These vary from sandy loams to clayey in texture.
These are generally rich in potash but poor in phosphorus. These soils are generally clayey, deep and impermeable. Chemically, black soils consists of lime, iron, magnesium and aluminium. They also contain potash. But they lack phosphorus, nitrogen and organic material.
They retain moisture and are suitable for cotton cultivation.Brief Essay on Earth The lowest thick layer of atmosphere extending to an average altitude of 10 km. It is a region of clouds, dust and water vapours. (ii) Stratosphere: It is the region above Troposphere, extending up to 50 km above Earth.
Here the temperature remains constant. The study of the structure of the earth focuses on its layered structure, and the variations in the density and temperature, at various depths. The shape of the earth is that of a spheroid with mean equatorial radius of km.
and polar radius of km. concisely speaking, the earth is a globe having a radius of kilometers. Ozone layer The ozone layer is a layer in Earth's atmosphere which contains relatively high concentrations of ozone (O3 Words; 5 Pages; Ozone Layer The ozone layer is a layer in Earth's atmosphere which contains relatively high concentrations of ozone (O3).
Earth Is The Planet Of Earth Words | 7 Pages the earth was, the term ‘planet” or “celestial body” might come to mind, and those would both be an accurate response.
The Layers of the Earth. Essay by EssaySwap Contributor, High School, 10th grade, February download word file, 9 pages, Downloaded 32 times. Keywords Earth, Elements, Oxygen, Moon, rocks. 0 Like 0 Tweet. There are many different layers within the Earth.
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