GEO 121 10th Edition Lecture 14Outline of Last Lecture I. Tropic ConeII. AnalemmaIII. Solar RadiationIV. Atmospheric MoistureV. Absolute MoistureVI. Relative HumidityVII. Equilibrium VIII. Chapter HighlightsOutline of Current Lecture IX. Earth as a Planeta. Mechanicsb. Solstices and EquinoxesCurrent Lecture1. Earth as a Planeta. Mechanicsi. Rotation1. A circular movement of an object around a center (or point) of rotation. A three-dimensional object always rotates around an imaginary line called a rotation axisii. Revolution1. revolution, one full turn; one full spin; instance of revolving or spinning; set order in which events take place ii. Inclination1. The magnetic field around Earth causes not only a compass needle to point north, but also to tip downward in a straight-line direction to northii. Parallelism 1. As Earth rotates around the sun, the planetary axis remains parallel to all its former positionsb. Solstices and Equinoxes i. Summer Solstice- June 21 (23.5 degrees N)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.ii. Winter Solstice- December 21 (23.5 degrees S)iii. Fall Equinox- September 23 (180 degrees E/W)iv. Spring Equinox- March 20 (180 degrees
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