61. The process of destruction or dying of fronts is called
A. Frontogenesis
B. Frontolysis
C. Both (a) and (b)
D. None of the above
62. The Palaeozoic era starts at ____ million years ago and ends at ____ million years ago.
A. 500, 100
B. 570, 225
C. 470, 150
D. 470, 225
63. The reaction is carbonate and bicarbonate ions with mineral is called
A. Hydrolysis
B. Carbonation
C. Oxidation
D. Solution
64. The plants grown in equatorial regions include
A. Wheat, barley, maize
B. Evergreen dense forests, rubber trees, groundnuts
C. Groundnuts, soybeans, potatoes
D. Evergreen coniferous forests, oats, cocoa
65. The process that may cause physical weathering or mechanical rupture are
A. Abrasion, crystallization, pressure release
B. Abrasion, oxidation, hydrolysis
C. Crystallization, carbonation, thermal insolation
D. None of the above