WAEC Geography Past Questions & Answers - Page 2

On December 22nd, the sun is overhead at the Tropic of capricon, resulting in December winter solstice

Initial temperature = 40oC
Final temperature = ?
According to lapse rate
1000m ascent = 6.5oC decrease in temp.
4000m =x
4000 = 6.5 x 4=26.0oC
Final temp. = (40o -26o)C=14oC

The population density of a country is calculated by dividing the total population by the total land area. Therefore, for a country with a total population of 140,000,000 and a total land area of 500,000 km2, the population density would be 140,000,000 / 500,000 = 280 persons per km2.

A rift valley is a linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault. This process of valley formation is known as parallel faulting. A rift valley is formed on a divergent plate boundary, a crustal extension, a spreading apart of the surface, which is subsequently further deepened by the forces of erosion. When the tensional forces are strong enough to cause a plate to split apart, it does so along a rift zone.

Loess is a wind-deposited sediment that is composed of fine particles of dust, clay and silt. It is a landform created by the action of wind. Other options like Rock pedestal, Deflation hollow, Yardang are formed by the action of water and erosion, not wind.