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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  • Why are deserts so dry?

    Q: Why are deserts so dry?

    A: Deserts are dry because the air above them is lacking moisture. This is caused by rain shadows, moisture sources being too far away, cold ocean currents nearby or the Earth's circulation patterns.
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  • What is a ring-shaped coral island called?

    Q: What is a ring-shaped coral island called?

    A: A ring-shaped coral island is called an atoll. According to Encyclopedia Britannica, an atoll is made up of sections of coral reef that form a closed shape around a central lagoon.
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  • How were the Snowy Mountains formed?

    Q: How were the Snowy Mountains formed?

    A: The Snowy Mountains in the Australian Alps started forming about 860 million years ago by different marine sediments when southeast Australia was covered by the sea, according to Swirk. Natural forces up folded and lifted these rocks, then were later flattened by erosion leaving the sharp edge plateaux seen today. The valleys were formed by river water erosion.
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  • What are the main landforms in the desert?

    Q: What are the main landforms in the desert?

    A: The most common landscape features found in deserts are sand dunes, yardangs, desert pavements, debris, playas, oases, mesas, alluvial fans, arroyos and buttes. These landforms vary from desert to desert.
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  • Where does the River Thames start and end?

    Q: Where does the River Thames start and end?

    A: The River Thames originates in a meadow in the Cotswold Hills in Gloucestershire and travels 215 miles through England before emptying into the North Sea near Essex.
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  • What are the Appalachian Highlands?

    Q: What are the Appalachian Highlands?

    A: The Appalachian Highlands are a mountain range in Eastern North America. They run from Canada to regions of Georgia and through Alabama.
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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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  • 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 a group of mountains called?

    Q: What is a group of mountains called?

    A: A group of mountains is known as a mountain range. A group of ranges that share a common origin and form are a mountain system. A group of systems are a mountain chain. A group of ranges, systems and chains are known as a mountain belt or a cordillera.
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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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  • How did oceans form?

    Q: How did oceans form?

    A: Nearly 3.8 billion years ago, temperatures on Earth cooled below 100 degrees Celsius for the first time, allowing water, which existed on the planet in gaseous form, to condense into rain and collect on the planet's surface, according to the American Museum of Natural History. This water collected in low-lying areas, eventually becoming a primitive ocean.
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  • How were the Hawaiian Islands formed?

    Q: How were the Hawaiian Islands formed?

    A: The Hawaiian Islands are volcanic in origin, and they formed millions of years ago. According to the National Ocean Service, the islands developed because of a hot spot in the middle of the Pacific Ocean. The consistent eruption of lava fed by the hot spot resulted in volcano formations that rose above sea level to form the islands of Hawaii.
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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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  • 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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  • How do landforms affect climate?

    Q: How do landforms affect climate?

    A: Landforms affect climate by altering the wind and rate of evaporation, which can cause changes in the temperature, humidity and precipitation of a region. When storm fronts run into landforms, such as mountains or high plateaus, rain clouds are sometimes blocked. This causes the upwind side of the landform to receive plentiful rainfall, while the downwind side of the structure remains dry.
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  • What is a delta in geography?

    Q: What is a delta in geography?

    A: A delta is an area of land in which a river divides into smaller rivers and empties into a larger body of water. It is also possible to have a delta that empties into land, but it is uncommon.
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  • What is the Tonga Trench?

    Q: What is the Tonga Trench?

    A: The Tonga Trench is a submarine trench located in the floor of the South Pacific Ocean. It forms the eastern boundary of the Tonga Ridge. It's 35,702 feet deep at its deepest point and has an average depth of 20,000 feet. It's about 50 miles wide and 850 miles in length. The Tonga Trench and Tonga Ridge form the northern half of the Tonga-Kermadec Arc.
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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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  • 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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  • 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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  • 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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