The scope of Oceania can be divided into narrow sense and broad sense. In a narrow sense, it only refers to the three islands in the Pacific Ocean, namely Polynesia, Micronesia and Melanesia. Broadly speaking, in addition to the three major island groups, Australia, New Zealand and New Guinea are also included, with a total number of islands exceeding 654.38 million. The total land area is about 8.97 million square kilometers, accounting for about 6% of the world's total land area. It is the smallest continent in the world.
Extended data:
The African continent reaches Cape Hafeng (5124' e,10 27' n) in the east, Cape Gullers (20 02' e, 34 51's) in the south and Cape Verde (1n) in the west.
The plateau area of the African continent is vast, and the plateau with an altitude of 500-1000 meters accounts for more than 60% of the African area, so it is called "plateau continent". The mountainous plateau above 2000 above sea level accounts for about 5% of Africa. The plains below 200 meters above sea level are mostly distributed in coastal areas, accounting for less than 10% of Africa. The average elevation of the African continent is 650 meters.
Africa is one of the birthplaces of ancient humans and ancient civilizations in the world, and the earliest written records appeared in 4000 BC. Egypt in North Africa is one of the cradles of world civilization.
Since Portugal occupied Ceuta in 14 15, European powers began to colonize Africa, which reached its peak from the end of 19 to the beginning of the 20th century. About 95% of Africa's territory was carved up by the great powers, and resources were plundered for a long time. After 1947, the colonies became independent one after another, and the year of African independence (1960) symbolized the end of the African colonial era.
References:
Baidu encyclopedia-seven continents
Baidu Encyclopedia-Africa