Silica, also called silicon dioxide, compound of the two most abundant elements in Earth's crust, silicon and oxygen, SiO2. The mass of Earth's crust is 59% silica, the main constituent of more than 95% of the known rocks.
Answer: Option 1
Oxygen is the most abundant element in the Earth's crust. Oxygen makes up 467,100 ppm (parts per million) of the Earth's crust, or 46.6%.
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Oxygen is by far the most abundant element in the earth's crust. Scientists estimate oxygen comprises nearly half of the mass of the crust. It also accounts...
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The upper part of the mantle upon which the crust of the Earth floats is called Asthenosphere. The layer below the rigid lithosphere is a zone of...
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Aluminum is the most abundant metal in the earth's crust, but it is never found free in nature. All of the earth's aluminum has combined with other...
Answer: Option 1
Igneous rock has formed the Earth's crust. Most of the Earth's Crust is formed of Sial and Sima i.e. (Silica, Aluminium and Silica Magnesium) composition. Both of...
Answer: Option 1
Majority of Earth's crust is composed of igneous rock with about 90% of share. The sial & sima i.e. silica alumina & silica magnesium respective are igneous...
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46.6% Oxygen is the most abundant element in the Earth's crust. Oxygen makes up 467,100 ppm (parts per million) of the Earth's crust, or 46.6%. It exists...
Answer: Option 4
The average density of the upper crust is 2.8 and that of the lower crust is 3.0. This difference in density is believed to be due to...
