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The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiatio ...
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Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook seems to have been the first to coin the term 'speciation' for the splitting of linea ...
Country
Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia. With an area of 147,181 square kilometres and a population of approximately 27 millio ...
Definition
Fluvial is a term used in geography and Earth science to refer to the processes associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associa ...
Definition
The ecliptic is the apparent path of the Sun on the celestial sphere as seen from the Earth's center, and also the plane of this path, which is essentially coplanar with the orbit of the Earth aro ...
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The second is the base unit of time in the International System of Units (SI) and is also a unit of time in other systems of measurement (abbreviated s or sec). Between 1000 (when al-Biruni used secon ...
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Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. The Geothermal energy of the Earth's crust originates ...
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Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with symbol U and atomic number 92. A uranium atom has 92 protons and 92 electrons, of which 6 are va ...
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Gold is a dense, soft, shiny, malleable and ductile metal. It is a chemical element with the symbol Au (aurum in Latin, meaning glow of sunrise) and atomic number 79. It has a bright yellow color and ...
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Asteroids are minor planets that are not comets, especially those of the inner Solar System. They have also been called planetoids, especially the larger ones. These terms have historically been appli ...
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