Describe The Principal Constituents Of Earth?
Answers
Answer:
The principal constituents of the earth can be considered in four broad groups:
The lithosphere, which is the outer skin of the earth made up of rocks and minerals.
The atmosphere, which is the gas or vapor envelope around the earth.
The hydrosphere, which is the liquid portion of the earth, including the water vapour of the atmosphere, the water present in oceans, seas, rivers and lakes, and the water present in rocks, and.
The biosphere, which is the world Of living organisms that dwell on land, in water and in the air that we breath
The Composition and Structure of Earth
The Composition and Structure of EarthCore, mantle, and crust are divisions based on composition. The crust makes up less than 1 percent of Earth by mass, consisting of oceanic crust and continental crust is often more felsic rock. The mantle is hot and represents about 68 percent of Earth’s mass. Finally, the core is mostly iron metal. The core makes up about 31% of the Earth. Lithosphere and asthenosphere are divisions based on mechanical properties. The lithosphere is composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid. The asthenosphere is partially molten upper mantle material that behaves plastically and can flow. This animation by Earthquide shows the layers by composition and by mechanical properties.
