phrase [sphere inflects] A country's sphere of influence is an area of the world where it has a lot of influence. Ionosphere definition is - the part of the earth's atmosphere in which ionization of atmospheric gases affects the propagation of radio waves, which extends from about 30 miles (50 kilometers) to the exosphere, and which is contiguous with the upper portion of the mesosphere and the thermosphere; also : a comparable region of charged particles surrounding another celestial body (such as Venus). Geography is a science that deals with Earth’s surface. Sphere frequently occurs in the phrase “sphere of influence,” which designates the geographical area over which a person, organization, or nation has control. Synonyms: area, range, scope, field More Synonyms of sphere of influence. The Warsaw Pact and the Soviet Union are not re-emerging, but a more traditional, soft sphere of influence based on historical Russian geography and empire building is. Define ecosphere. b. the surface of such a figure; a spherical surface. Developable surfaces have several practical applications. n. The regions of the universe, especially on the earth, that are capable of supporting life; the biosphere. (Entry 1 of 3) 1 a (1) : the apparent surface of the heavens of which half forms the dome of the visible sky. merging of cultures. 2. any rounded, globular body. 3. the place or environment within which a person or … People who study geography are called geographers. an area in which the power or interests of a country or an organization are of greatest importance (Definition of sphere of influence from the Cambridge Academic Content Dictionary © Cambridge University Press) Examples of sphere of influence Rural-urban fringe: The boundary between the urban area and the rural area. The same applies to other reference surfaces used as models for the Earth, such as oblate spheroids, ellipsoids and geoids.Since any map projection is a representation of one of those surfaces on a plane, all map projections distort. ...countries traditionally within the British or American spheres of influence. The layers of Earth's atmosphere An atmosphere (from Ancient Greek ἀτμός (atmos), meaning 'vapour', and σφαῖρα (sphaira), meaning 'ball' or 'sphere') is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body. Developable Mechanisms are mechanisms that conform to a developable surface and can exhibit motion (deploy) off the surface.. See more. The media is, by and large, absent regarding this story. The media condemns Russian President Vladimir Putin as a human rights violator who did not return an American defector. Biosphere (Living Things) All the living things in the planet are categorized under the biosphere. 5 people chose this as the best definition of hemisphere: Either the northern or so... See the dictionary meaning, pronunciation, and sentence examples. The Lithosphere. Core-domain-sphere model. sphere of influence. ный, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content. Many cartographic projections involve projecting the Earth to a developable surface and then "unrolling" the surface into a region on the plane. cultural convergence. sphere great circle - Any circle on the surface of a sphere that lies on a plane through its center, or a circle that divides into two equal parts—as the Equator. If you cut a sphere at one of its great circles, you'd cut it exactly in half. In … The biosphere extends from the deepest root system s of trees, to the dark environment of ocean trench es, to lush rain forest s and high mountain tops. 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