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Science Test # 3
Question | Answer |
---|---|
minutes | used for latitude and longitude has 60 egual parts |
1 minute='s | 1.85km |
seconds | each minute is divides into 60 equal parts |
meridians/ longitude | angular distance, east or west of the prime meridian |
PRIME meridian | 0 degresse longitude goes through greenwhich england |
geographic north pole | true north |
washington | 39 degresse North38 degresse 53'38 degresse 53' 51" 77 degresse west38 degresse 53' 51"n, 77 degresse 33" |
North and south geographic poles | reference points for establishing directions |
Parallels/ latitude | circles that run east and west around the world parallel to the equator, measures north or south |
great circle | line that circles the earth & didvie=des the globe into two halfs |
magnetic compass | helps indicate direction |
GEOMATIC POLES | POINTS OF THE EARTH SURFACE JUST ABOVE THE POLES THE IMAGINARY MAGNET |
MAGNETIC DECLENATION | ANGEL B/T THE DIRECTION OF THE GEORAHPIC POLES & THE DIRECTION COMPASS |
MELBOURE, AUSTRALIA | 39 DEGREES S |
How is a Mercator map made | Wrap a cylinder of paper around a lightedglobe |
What are advantages of the Mercator projection | acurate at equator, all compass dires appears in straight lines, all mederans and paralles are shown correctly |
What are disadvantages of Mercator projection | not aquate at poles, only areas near equator are shown with accuracy, distorts distances b/c regions of land & distorts |
How is gnomonic projection made | a sheet of paper touching a lighted globe at on ly one point produces a gno pro |
What is advantages of gnomonic | little distortion occurs at the point of contact, great help to navigators in finding circle |
Disadvantage of gnomonic projection | distortion is great when you move away from the source on contact |
how is a conic map projection made | paper cone placed over a lighted globe |
what is advantage of conic map projection | closer view of an area gives a detailed map |
what is disadvantage of conic map projection | all areas except designated is distorted |