66. The process of particle detachment by moving glacial ice is called
A. Plucking
B. Abrasion
C. Scouring
D. None of the above
67. The points in the ecliptic farthest north and south of the celestial equator are called
A. Summer and winter solstices
B. Autumnal and vernal equinox
C. North celestial pole and south celestial pole
D. None of the above
68. Which of the following is concerned with the description and mapping of the main features of the universe?
A. Cosmography
B. Cosmology
C. Geomorphology
D. None of these
69. The process that creates the deep oceanic trenches is called
A. Plate tectonics
B. Seafloor spreading
C. Continental drift
D. Isostasy
70. The rainfall in the peninsular interior averages about
A. 650 mm a year
B. 750 mm a year
C. 850 mm a year
D. 550 mm a year