Australia is a constitutional monarchy with a federal division of powers. It uses a parliamentary system of government with Queen Elizabeth II at its apex as the Queen of Australia, a role that is dis ...
Only seven African countries are not geopolitically a part of Sub-Saharan Africa: Algeria, Egypt, Libya, Morocco, Tunisia, Western Sahara (claimed by Morocco) and Sudan, they form the UN subregion of ...
Traditional Sub-Saharan African music is as diverse as the region's various populations. The common perception of Sub-Saharan African music is that it is rhythmic music centered around the drums. It i ...
Forty percent of African scientists live in OECD countries, predominately in Europe, the United States and Canada. This has been described as an African brain drain. Even with the drain, enrollments i ...
Geographers historically divided the region into several distinct ethnographic sections based on each area's respective inhabitants.Commentators in Arabic in the medieval period used the general term ...
In 1494, Portugal and Spain, the two great maritime European powers of that time, on the expectation of new lands being discovered in the west, signed the Treaty of Tordesillas, by which they agreed, ...
Geologically, Canada is one of the oldest regions in the world, with more than half of the region consisting of precambrian rocks that have been above sea level since the beginning of the Palaeozoic e ...
One of the main uses of weather radar is to be able to assess the amount of precipitations fallen over large basins for hydrological purposes. For instance, river flood control, sewer management and d ...
Water-saturated airAir contains water vapor and the amount of water in a given mass of dry air, known as the mixing ratio, is measured in grams of water per kilogram of dry air (g/kg). The amount of m ...
Deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures falling sharply at night. The diurnal range may be as much as 20 to 30 °C (36 to 54 °F) and the ro ...
Earth's north pole is covered by floating pack ice (sea ice) over the Arctic Ocean. Portions of the ice that do not melt seasonally can get very thick, up to 3–4 meters thick over large areas, with r ...
Arctic tundra occurs in the far Northern Hemisphere, north of the taiga belt. The word "tundra" usually refers only to the areas where the subsoil is permafrost, or permanently frozen soil. (It may al ...
This type of climate offers some of the most extreme seasonal temperature variations found on the planet: In winter, temperatures can drop to ?40 °C (?40 °F) and in summer, the temperature may exc ...
Two types of steppe can be recorded:Temperate steppe: the "true" steppe, found in continental areas of the world; they can be further subdivided, as in the Rocky Mountains SteppesSubtropical steppe: a ...
Under the K?ppen climate classification, "dry-summer subtropical" climates (classified as Csa and Csb) are often referred to as "Mediterranean". Under the K?ppen-Geiger system, "C" zones have an ave ...
