152. Broadly, there are the three layers of the Earth; the crust, the mantle and the core. The crust forms what percent of the total volume of the Earth ______?
(a) 0.5%
(b) 1%
(c) 2%
(d) 2.5%
153. The land mass of which of the following continents is the least ______?
(a) Europe
(b) Africa
(c) Australia
(d) Asia
154. A nautical mile is ______?
(a) 1,000 m
(b) 1225 m
(c) 1525 m
(d) 1852 m
155. A violent whirl wind characterized by a black funnel-shaped cloud hanging from heavy cumulonimbus is known as ______?
(a) Typhoon
(b) Antipodes
(c) Tornado
(d) Hurricane
156. Atmospheric temperature increases at higher altitudes because of ______?
(a) Radiation
(b) Convection
(c) Conduction
(d) Inversion
157. Which one of the following crops needs maximum water per hectare ______?
(a) Wheat
(b) Barley
(c) Sugarcane
(d) Maize
158. The polar diameter of the Earth is shorter than the Equatorial diameter by ______?
(a) 23
(b) 33
(c) 43
(d) 53
159. The Earth completes one rotation on its axis in ______?