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2. Earth system science - Wikipedia

   en.wikipedia.org/wiki/Earth_system_science

   Earth system science. An ecological analysis of CO. 2 in an ecosystem. As systems biology, systems ecology seeks a holistic view of the interactions and transactions within and between biological and ecological systems. Earth system science ( ESS) is the application of systems science to the Earth.

3. Geologic time scale - Wikipedia

   en.wikipedia.org/wiki/Geologic_time_scale

   Geologic time scale. The geologic time scale, proportionally represented as a log-spiral with some major events in Earth's history. A megaannus (Ma) represents one million (10 6) years. The geologic time scale or geological time scale ( GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating ...

4. World religions - Wikipedia

   en.wikipedia.org/wiki/World_religions

   World religions. Symbols commonly associated with six of the religions labelled "world religions": clockwise from the top, these represent Judaism, Islam, Buddhism, Hinduism, Taoism, and Christianity. World religions is a category used in the study of religion to demarcate at least five—and in some cases more—religions that are deemed to ...

5. History of Earth - Wikipedia

   en.wikipedia.org/wiki/History_of_Earth

   Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. [4] [5] [6] Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.

6. World Geodetic System - Wikipedia

   en.wikipedia.org/wiki/World_Geodetic_System

   The World Geodetic System ( WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM).

7. Climate classification - Wikipedia

   en.wikipedia.org/wiki/Climate_classification

   Climate classification. Climate classifications are systems that categorize the world's climates. A climate classification may correlate closely with a biome classification, as climate is a major influence on life in a region. One of the most used is the Köppen climate classification scheme first developed in 1884. [1]

8. Earth ellipsoid - Wikipedia

   en.wikipedia.org/wiki/Earth_ellipsoid

   An Earth ellipsoid or Earth spheroid is a mathematical figure approximating the Earth's form, used as a reference frame for computations in geodesy, astronomy, and the geosciences. Various different ellipsoids have been used as approximations. It is a spheroid (an ellipsoid of revolution) whose minor axis (shorter diameter), which connects the ...

9. Earth - Wikipedia

   en.wikipedia.org/wiki/Earth

   Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.