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Basic Geodesy


Quiz Questions

1._______________________ is one of the earth sciences.
Geodesy
Geology
2. A major topic of geodesy is _________________.
The shape and size of the earth
The gravity field of the earth
Point positioning
All of the above
3.When traveling north at night, the north pole star appears ________________.
To get higher in the sky
To go lower in the sky
4.When traveling north by day, a man’s shadow at noon becomes ____________________.

Smaller
Longer
5.Erathosthenes, who lived in Alexandria, Egypt, in the third century BC, was a genius who computed the size of the earth from watching a sun dial cast its shadow at noon on a certain day.
True
False
6.In the 17th century, it was not possible to measure distances and gravity precisely enough to notice that the curvature of the earth was not the same at different places.
True
False
7.Three surfaces of the earth are:
The topography, the geoid, and the ellipsoid
The ground, the geoid, and the ellipsoid
8.Geoidal maps give the geoidal heights in relation to the _______________.
Topography
Ellipsoid
9.AMS is also called as ______________________.
TOPOCOM
Ellipsoid
10.The earth’s attraction called gravity does not cause things to fall.
True
False
11.At the seashore the difference between the denser land mass and the less dense water will have the same effect.
True
False
12.The science of _____________ is necessary to explain and evaluate the influence of gravity and to determine corrections to apply to our measurements.
Geodesy
Geology
13.The deflection of the horizontal is the angle between the observed vertical direction of the plumb line and the normal to the ellipsoidal model.
True
False
14.The angle of deflection equals the angle of ____________________.
Warping
Refraction
15.The level surface which coincides with mean sea level is called _________________.
Ellipsoid
Geoid
16.Astrogeodetic deflections use _________________.
Surface gravity
Triangulation
Geodesy
17.Gravimetry use _____________________.
Surface gravity
Triangulation
Geodesy
18.Traverse methods use ___________________.
Angles
Distances
Angles and distances
19.Longitude refers to __________________.
Set of circles of parallel to the equator
Set of ellipses
20.Figure 30 represents the deflection of the ______________.
Horizontal
Vertical
21.A boat on the horizon is represented in ________________.

Figure 1
Figure 2
Figure 3
22.The Eratosthenes concept is represented in ______________________.

Figure 1
Figure 3
Figure 4
23.The ellipsoid is represented in ___________________.

Figure 6
Figure 7
Figure 8
24.The earth’s shape could be told by the satellite data and this is pictorially represented in _________________.

Figure 6
Figure 7
Figure 8
25.The warping of the level surface is represented in ___________________.
Figure 16
Figure 17
Figure 18