Geography

Metamorphism Definition Metamorphism is the process by which rocks are changed in composition, texture, or structure by extreme heat and pressure. The change occurs primarily…

Metasomatism Definition Metasomatism is the process by which the chemical composition of a rock is changed through the introduction or extraction of chemicals dissolved in…

What is Permafrost? Permafrost is a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in Polar Regions. It is defined…

Persian Gulf Oil The gulf has many fishing grounds, extensive reefs (mostly rocky, but also coral), and abundant pearl oysters, but its ecology has been…

Igneous Rock Definition Igneous rocks are formed by the cooling and hardening of molten material called magma. It is one of the three main rock…

Proterozoic Definition Proterozoic is the later of the two divisions of the Precambrian Eon, from about 2.5 billion to 540 million years ago. The Proterozoic…

Yangtze River, longest river in both China and Asia and third longest river in the world, with a length of 3,915 miles (6,300 kilometres). The…

Amazon River, the greatest river of South America and the largest drainage system in the world in terms of the volume of its flow and…

Nile River, the longest river in the world, called the father of African rivers. It rises south of the Equator and flows northward through northeastern…

Health Geography Definition Health geography is the study of the distribution, diffusion, determinants, and delivery associated with health and health systems in human populations. It…

Global Health Effects and Prevention of Air Pollution Air pollution is a chemical, physical or biological agent that alters the natural characteristics regarding the atmosphere.…

Definition, Causes and Effects of Air Pollution Air pollution is one such form that refers to the contamination of the air, irrespective of indoors or…