Geography

Metamorphism

Metamorphism

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 due to heat, pressure, and the introduction of chemically active fluids. The chemical components and crystal structures of.....

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Metasomatism

Metasomatism

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 fluids that migrate through the rock’s pores. Metasomatism often results in the formation of new minerals, especially m.....

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Permafrost and its Effects

Permafrost and its Effects

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 as ground (soil or rock and included ice or organic material) that remains at or below 0°C for at least two consecutive years. Lowland per.....

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Persian Gulf Oil

Persian Gulf Oil

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 damaged by industrialization and oil spills. The majority of the Persian Gulf Oil Fields are located in the Persian Gulf Basin Located between E.....

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Igneous Rock

Igneous Rock

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 types, the others being sedimentary and metamorphic. The word igneous comes from the Latin word ignis, meaning fire. Volcanic rocks are named after Vulca.....

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Proterozoic

Proterozoic

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 was characterized by the formation of stable continents, the appearance of abundant bacteria and archaea, and the buildup of oxygen in the .....

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Yangtze River – China

Yangtze River – China

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 Yangtze River has a strong claim to being the most interesting river in the world, with a wide variety of tourist attractions, scenery, and culture along .....

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Amazon River

Amazon River

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 the area of its basin. The Amazon River is the second longest river in the world, and the largest in terms of the size of its watershed, the number of […]Read More »

Nile River

Nile River

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 Africa to drain into the Mediterranean Sea. The two major tributaries, commonly known as the White Nile and Blue Nile whose sources are Central a.....

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Health Geography

Health Geography

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 is a close relative of medical geography. It shares a focus on geographical variations in health and healthcare. .....

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Global Health Effects and Prevention of Air Pollution

Global Health Effects and Prevention of Air Pollution

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. Air pollution is the world’s deadliest environmental problem. It kills 7 million people each year, or one in eight de.....

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Definition, Causes and Effects of Air Pollution

Definition, Causes and Effects of Air Pollution

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 outside. A physical, biological or chemical alteration to the air in the atmosphere can be termed as pollution. It occurs when any harmful gases, .....

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