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Hace 2 días · The early evolution of the solid Earth and its atmosphere and oceans is covered in geologic history of Earth. The geologic and biological development of Earth, including its surface features and the processes by which they are created and modified, are discussed in geochronology, continental landform, and plate tectonics.
- Basic Planetary Data
Earth - Planet, Atmosphere, Geology: The mean distance of...
- The Atmosphere
Earth - Atmosphere, Climate, Ozone: Earth is surrounded by a...
- Accretion of the Early Earth
Earth - Accretion, Formation, Core: As the gas making up the...
- Planetary Differentiation
Earth - Differentiation, Formation, Structure: Once hot,...
- Structure, Composition, Development
Development of Earth’s structure and composition. The origin...
- The Outer Shell
Earth - Core, Crust, Mantle: Earth’s outermost, rigid, rocky...
- Basic Planetary Data
Hace 4 días · The usual English proper name for Earth's natural satellite is simply Moon, with a capital M. The noun moon is derived from Old English mōna, which (like all its Germanic cognates) stems from Proto-Germanic *mēnōn, which in turn comes from Proto-Indo-European *mēnsis "month" (from earlier *mēnōt, genitive *mēneses) which may be related to the verb "measure" (of time).
- 405400 km, (404000–406700 km)
- 362600 km, (356400–370400 km)
- Earth I
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Hace 5 días · The Earth is the only known planet where plate tectonics operates. We review features of Archaean and early Proterozoic geology that constrain tectonic environments and inform discussions of the onset of plate tectonics. There is the question of scale, and how the results of individual case studies are put into a wider global context.
Hace 1 día · Over the course of Earth's geologic history CO 2 concentrations have played a role in biological evolution. The first photosynthetic organisms probably evolved early in the evolutionary history of life and most likely used reducing agents such as hydrogen or hydrogen sulfide as sources of electrons, rather than water. [126]
Hace 3 días · Earth remains the only place in the universe known to harbor life. Geochemical and fossil evidence from the Earth informs most studies of abiogenesis. The Earth was formed at 4.54 Gya, and the earliest evidence of life on Earth dates from at least 3.8 Gya from Western Australia .
Hace 21 horas · An artist's impression of early Earth. getty. The first continents on Earth formed between 3 and 2.5 billion years ago. Geologists studying the oldest rocks found on Earth believe that partial ...
Hace 1 día · The Gaia hypothesis has been modified over time in response to criticisms and therefore it is difficult to provide a precise definition. This lack of clarity has presented a problem to those scientists who needed a deep and accurate understanding of how our environment works in order to successfully negotiate the next few centuries of tremendous human-induced changes.
