Landforms

A:

Metamorphic rocks form when igneous or sedimentary rocks are subjected to extreme heat, pressure or chemical reactions. These forces alter the composition of the rocks, leading to changes in the rocks' density, appearance and structure.

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  • What do the Pampas, prairies, steppes and the Highveld have in common?

    Q: What do the Pampas, prairies, steppes and the Highveld have in common?

    A: The Highveld, the Pampas, steppes and prairies are all grasslands, which are biomes dominated by grasses, flowers and herbs. Savannas and the Llanos region of northern South America are also grasslands.
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  • What causes metamorphic rocks to form?

    Q: What causes metamorphic rocks to form?

    A: Metamorphic rocks form when igneous or sedimentary rocks are subjected to extreme heat, pressure or chemical reactions. These forces alter the composition of the rocks, leading to changes in the rocks' density, appearance and structure.
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  • What are the three types of plateaus?

    Q: What are the three types of plateaus?

    A: The three types of plateaus are dissected, volcanic and oceanic plateaus. A plateau is described as a raised landform that extends above the surrounding area on at least one of the plateau's sides. Plateaus are found on every continent and make up 30 percent of the land on Earth.
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  • How do mountains affect climate?

    Q: How do mountains affect climate?

    A: Mountains affect climate by blocking wind and receiving more rainfall than low-lying areas. As air is forced over higher ground, it cools, causing moisture to condense and fall as rain. The higher a location is above sea level, the colder it is. This occurs because as altitude increases, the surround airing becomes thinner and less effective at absorbing and retaining heat.
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  • What is the bottom of the ocean called?

    Q: What is the bottom of the ocean called?

    A: The bottom of the ocean is known as the hadalpelagic zone and extends from 19,686 feet to the bottom of the ocean floor. This area is found in canyons and deep-water trenches, and the deepest part is found in the Marianas trench.
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  • What state is Mount McKinley in?

    Q: What state is Mount McKinley in?

    A: Mount McKinley is the tallest mountain in North America, and it is located in Alaska. It is found in the Denali National Park and Reserve, which is approximately 6 million acres of wild land.
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  • How do parabolic dunes form?

    Q: How do parabolic dunes form?

    A: As with all dunes, parabolic dunes are primarily shaped by the wind. Parabolic dunes tend to proliferate in places where wind blows predominantly in one direction and the movement of sand is restrained by vegetation.
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  • What is the world's largest peninsula?

    Q: What is the world's largest peninsula?

    A: The world's largest peninsula is the Arabian Peninsula. The Arabian Peninsula is located in Southwest Asia and contains the countries of Jordan, Iraq, Kuwait, Bahrain, Qatar, United Arab Emirates, Oman, Yemen and Saudi Arabia.
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  • What are examples of peninsulas?

    Q: What are examples of peninsulas?

    A: Peninsulas are found all around the world; in the United States, two prominent examples are the Upper Peninsula in Michigan and the Delmarva Peninsula in Maryland. Peninsulas are chunks of land that are surrounded on three sides by water and joined to larger bodies of land by a neck, called an isthmus. Peninsulas occur primarily along ocean coastlines, although they appear along large river borders too.
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  • Where are fjords found?

    Q: Where are fjords found?

    A: According to Geology professor Atle Nesje of Bergen University, fjords occur where there was glacial activity below where the sea level is as of modern times. Fjords.com notes that Norway and Canada are home to fjords and fjord lakes.
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  • How are islands formed?

    Q: How are islands formed?

    A: Islands form in several ways. The most common events that lead to island formation are volcanic activity and continental drift. Islands also form due to erosion, buildup of sediment and coral that grows enough to penetrate the surface of the water.
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  • What do Mount Etna in Sicily and Mount St. Helens in the U.S. have in common?

    Q: What do Mount Etna in Sicily and Mount St. Helens in the U.S. have in common?

    A: Both Mount Etna and Mount St. Helens are active stratovolcanoes, also known as composite volcanoes. In addition, both have experienced major activity in the twentieth and twenty-first centuries.
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  • Where do caves form?

    Q: Where do caves form?

    A: Most caves form in karst, which is a type of landscape composed of dolomite, gypsum and limestone rocks that gradually dissolves in the presence of slightly acidic water, according to National Geographic. Some caves are found in cliffs at the edge of a coastline. Others form in areas where the outer surface of a lava tube cools and hardens, and the molten rock’s inner content drains away.
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  • What is the difference between a canyon and a gorge?

    Q: What is the difference between a canyon and a gorge?

    A: A gorge is a much smaller, narrower version of a canyon. A gorge is similar to a ravine, while a canyon is similar to a valley. Gorges are located between mountains or hills and often have small streams at their bottoms.
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  • How do volcanoes form landforms?

    Q: How do volcanoes form landforms?

    A: Volcanoes form landforms when the lava that flows out of the peak solidifies into rock. Magma is molten rock from the Earth's mantle pushed up by the action of plate tectonics. When the magma flows or explodes out of the top of the volcano, it is called lava. Over geological timescales, this lava keeps piling on top of successive strata of cooled rock, making several different kinds of landforms.
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  • What are the windward and leeward sides of a mountain?

    Q: What are the windward and leeward sides of a mountain?

    A: The windward side of a mountain faces the wind while the leeward side faces away from the prevailing wind. The climate on different sides of the mountain can vary greatly.
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  • What makes a continent?

    Q: What makes a continent?

    A: A continent is a large land mass on Earth that is distinguished by a separation from other land by water or by a distinct cultural difference. Earth has a total of seven continents: North America, South America, Europe, Africa, Asia, Australia and Antarctica.
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  • What is a plateau?

    Q: What is a plateau?

    A: A plateau refers either to a piece of land that is level and located above nearby land, or the term can refer to a situation that is relatively unchanged for a period of time. In the case of an unchanged situation, the word has either a negative or a positive connotation, depending on whether change is advantageous.
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  • What is an example of a raised flat area?

    Q: What is an example of a raised flat area?

    A: An example of a raised flat area is a plateau. A plateau is a large flat region of land higher than the other areas of land surrounding it.
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  • How do geysers form?

    Q: How do geysers form?

    A: A geyser is essentially an underground hot spring that, owing to pressure exerted against its constricted plumbing toward the surface of the ground, issues a stream of steam and boiling water from time to time. The term "geyser" is derived from the Icelandic word "geysir," which means to rush forth. A geyser stops erupting once its reservoir is empty, or the water below the surface cools.
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  • How did the Grand Canyon form?

    Q: How did the Grand Canyon form?

    A: The Grand Canyon was formed primarily by erosion from the constant water flow of the Colorado River. This erosion occurred gradually over the past 5 to 6 million years.
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