Geography

Earth – Fact file

Total Surface area of Earth – 5.1x108 sq. km.

Total Land Area – 1.4x108 sq. km.

Average Relative Density ( when compared with that of water) – 5.52

Equatorial diameter – 12755 km. (app.)

Polar Diameter – 12712 km.

Equatorial circumference – 40074 km.

Polar circumference – 40003 km.

Deepest Point – Marian’s Trench (Pacific Philippines) 11033 km.

Minimum escape velocity – 11.2 km/s

Width of inner core of earth – 1300 km (app.)

Width of outer core – 2080 km.

Mantle width varies from 45 km to 2900 km. deep from earth’s surface.

Lithosphere extends from the Earth’s surface to 108 km. below it. It is mainly

made of Silicon and Aluminum.

Pyrosphere is located from 100 km. to 2880 km. depth and is mainly

composed of Basalt.

Barysphere is located from 2880 km. to the centre of the earth and is mainly

composed of Ferrous, Ferris, and Nickel.

41% of the total land on earth is Plains , 33% is Plateau and 26% is mountains

Major Equatorial Grasslands are Campos (Brazil), Lyons(Venezuela) and

savanna (Africa)

Major Tropical grasslands are Steppes (Russia), Pampas (Argentina), Prairies

(USA, Canada), Downs (Australia), Velds (South Africa), Pustag (Hungary),

Patna (Sri Lanka) and Cantabion (New Zealand).

The highest active volcano is the Catapixi in Ecuador.

Deepest place in Atlantic ocean is Puerto Rico Trench

Deepest place in Indian Ocean is the Sudan Trench.