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The later puranic view also asserts that the universe is created, destroyed, and re-created in an eternally repetitive series of cycles. In Hindu cosmology, the age of the Earth is about 4.32 billion years (the duration of a kalpa or one day of Brahma) [77] and is then destroyed by fire or water elements. At this point, Brahma rests for one ...
Variations in Earth's orbit, resulting changes in solar energy flux at high latitude, and the observed glacial cycles. Some variations in insolation are not due to solar changes but rather due to the Earth moving between its perihelion and aphelion , or changes in the latitudinal distribution of radiation.
The Gaia hypothesis (/ ˈ ɡ aɪ. ə /), also known as the Gaia theory, Gaia paradigm, or the Gaia principle, proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating, complex system that helps to maintain and perpetuate the conditions for life on the planet.
Schematic representation of the overall perturbation of the global carbon cycle caused by anthropogenic activities, averaged from 2010 to 2019. [1] The atmospheric carbon cycle accounts for the exchange of gaseous carbon compounds, primarily carbon dioxide (CO 2), between Earth's atmosphere, the oceans, and the terrestrial biosphere.
Oceans are the largest source of chlorine in the Earth's hydrosphere. [2] In the hydrosphere, chlorine exists primarily as chloride due to the high solubility of the Cl − ion. [3] The majority of chlorine fluxes are within the hydrosphere due to chloride ions' solubility and reactivity within water systems. [2]
A systems development life cycle is composed of distinct work phases that are used by systems engineers and systems developers to deliver information systems.Like anything that is manufactured on an assembly line, an SDLC aims to produce high-quality systems that meet or exceed expectations, based on requirements, by delivering systems within scheduled time frames and cost estimates. [3]
An illustration of ice age Earth at its glacial maximum. A "greenhouse Earth" is a period during which no continental glaciers exist anywhere on the planet. [6] Additionally, the levels of carbon dioxide and other greenhouse gases (such as water vapor and methane) are high, and sea surface temperatures (SSTs) range from 28 °C (82.4 °F) in the tropics to 0 °C (32 °F) in the polar regions. [7]
In Earth science, it is common to conceptualize the Earth's surface as consisting of several distinct layers, often referred to as spheres: the lithosphere, the hydrosphere, the atmosphere, and the biosphere, this concept of spheres is a useful tool for understanding the Earth's surface and its various processes [30] these correspond to rocks ...
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