GEOG 2051 : Up To First Exam Class Notes
Document Summary
The earth: shape: oblate spheroid, diameter: 7927 miles, 27 miles shorter through poles, 72% water, n. hemisphere land, s. hemisphere water, flatter at poles, mantle 3. 3 (specific gravity, crust 2. 7. Contour lines: lines on map that connects points of equal elevation, contour interval: distance between two contour lines, interpolate: estimate elevation, benchmark (bm) Types of projections: planar/plane (not completely accurate, conic, cylindrical, math/others, mercator projection (most common map) Scale: verbal, one inch = one mile. 20: graphic, 0_____1_____2_____3, fractional, 1/62,500 (one inch in one mile) 1/63360 (inches in a mile, small scale vs. large scale. Perihelion its closest position to the sun during the n. hem winter on jan 3. Aphelion farthest position from the sun during the n. hem. Fusion sun"s abundant hydrogen atoms are forced together and pairs of hydrogen nuclei are joined in the process of fusion. Magnetosphere a magnetic field surrounding earth, generated by dynamo-like motions within our planet.
