Wealth by Continent1
The surface and mantle are made up of 32% iron, 30% oxygen, 15% silicon, 14% magnesium and 9% other elements. The core consists of approximately 90% iron.
Distance to centre of the Earth
At the Equator: 6,378 km or 3,963 miles
At the Poles: 6,356 km or 3,949 miles
Average: 6,371 km or 3,959 miles
Circumference of the Earth: 40,075 km or 24,901 miles around the equator and 40,007 km around the poles.
The Earth’s Mass 5.9736×1024kg
Earths Volume is 108.321 x1010
The Radius of Earth’s core is 3485 km
General age of the World’s population1
Median age of the world’s population: 27.6 years
Men: 27 years
Women: 28.2 years
Life Expectancy1
Average Life expectancy
Men: 63 years
Women: 66 years
Highest by country: Andorra (83.5 years)
Lowest by country: Botswana (34 years)
World Population by Continent1
Ref:-
1: Just the Facts World Atlas by Dee Phillips published 2007
Earth Dimensions
