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geophysics

geophysics, study of the structure, composition, and dynamic changes of the earth, its atmosphere, hydrosphere and magnetosphere, based on the principles of physics. The term was probably first used in Germany, where it appeared in scientific writings of the mid-19th cent. Geophysics, which embraces the concepts, data, and methods of various other sciences, is very broad in scope. For example, geology, meteorology, hydrology, oceanography, and seismology all enter into geophysical studies, with many of them overlapping (e.g., meteorology and oceanography in the study of possible global warming). Most techniques for locating subsurface petroleum, mineral deposits, and water supplies are reliant upon applied geophysics, including the use of seismic and electrical measurements at shallow depths and gravimetric, magnetic, and radiometric surveys at ground stations and in airplanes. Information is then correlated with visible surface features, subsurface conditions are inferred, and boreholes are drilled to determine the extent and richness of promising areas. Geophysics also is used to understand the interactions of the atmosphere and hydrosphere, including how certain anomalies in the ocean's circulation affect the atmosphere. Magnetosphere studies in geophysics concentrate on the magnetic field around the earth. Other geophysical studies are more specific, i.e. selenophysics, or the physics of the moon. Recent flyby spacecraft have accumulated extensive physical data, allowing geophysicists to theorize, by analogy to geophysical earth studies, about the underlying structures, atmospheres, and magnetospheres of other planets and satellites in the solar system.

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"geophysics." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"geophysics." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/geophysics

"geophysics." The Columbia Encyclopedia, 6th ed.. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/geophysics

geophysics

ge·o·phys·ics / ˌjēōˈfiziks/ • pl. n. [treated as sing.] the physics of the earth. DERIVATIVES: ge·o·phys·i·cal / -ˈfizikəl/ adj. ge·o·phys·i·cist / -ˈfizisist/ n.

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"geophysics." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"geophysics." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/geophysics

"geophysics." The Oxford Pocket Dictionary of Current English. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/geophysics

geophysics

geophysics Study of the characteristic physical properties of the Earth as a whole system. It uses parts of chemistry, geology, astronomy, seismology, meteorology, and many other disciplines. From the study of seismic waves, geophysicists deduced the Earth's interior structure.

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"geophysics." World Encyclopedia. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"geophysics." World Encyclopedia. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/geophysics

"geophysics." World Encyclopedia. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/geophysics

geophysics

geophysics The science concerned with all aspects of the physical properties and processes of the Earth and planetary bodies and their interpretation, including, for example, seismology, gravity, magnetism, heat flow, and geochronology.

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"geophysics." A Dictionary of Earth Sciences. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"geophysics." A Dictionary of Earth Sciences. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/geophysics

"geophysics." A Dictionary of Earth Sciences. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/geophysics