GEOG 111 Lecture Notes - Lecture 2: Declination, Ecliptic, Antarctic Circle
6 Sep 2016
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Document Summary
Antarctic circle: southerly of the 5 major circles of latitude, containing the antarctic. Aphelion: point on the elliptical orbit where the earth is furthest from the sun (july 4) Atmosphere: air (mainly gases) first to interact with solar energy and the outer most sphere, provides c, n, and o for biosphere. Axial rotation: rotation of earth on an invisible axis going through the north pole to the south. Axial tilt: 23. 5 degree tilt of the earth"s axis, 66. 5 degree angle from the orbital (elliptical) plane. Biosphere: overlaps the other 3 spheres and holds life forms. Circle of illumination: divides the earth in half by day and night, earth moves around the circle as the illumination stays constant. Closed flow system: only inputs and outputs of energy occurs not matter. Equator: center of earth, starting point of latitude (parallel, 0 degree) up to 90 degree north (+) or south (-)
