Africa is the world's second-largest and second-most-populous continent. At about 30.2 million km2 (11.7 million sq mi) including adjacent islands, it covers six percent of the Earth's total surface area and 20.4 percent of the total land area.[2 With 1.1 billion people as of 2013.
it accounts for about 15% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, both the Suez Canal and the Red Sea along the Sinai Peninsula to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It has 54 fully recognized sovereign states ("countries"), nine territories and two de facto independent states.
Asia is the Earth's largest and most populous continent, located primarily in the eastern and northern hemispheres. Though it covers only 8.7% of the Earth's total surface area, it comprises 30% of earth's land area, and has historically been home to the bulk of the planet's human population (currently roughly 60%).
Asia is notable for not only overall large size and population, but unusually dense and large settlements as well as vast barely populated regions within the continent of 4.4 billion people. Asia has exhibited economic dynamism (particularly East Asia) as well as robust population growth during the 20th century.
is a continent that comprises the westernmost peninsula of Eurasia. It is generally divided from Asiaby the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterwaysconnecting the Black and Aegean Seas.
Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and the Black Sea and connected waterways to the southeast. Yet the borders of Europe—a concept dating back to classical antiquity—are arbitrary, as the primarily physiographic term "continent" also incorporates cultural and political elements.
Europe is the world's second-smallest continent by surface area, covering about 10,180,000 square kilometres.