Landforms

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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  • 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 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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  • How do you define "Barrier Island"?

    Q: How do you define "Barrier Island"?

    A: A barrier island is a long, thin stretch of sand deposited parallel to the mainland. One side of a barrier island faces the ocean, while the other side faces an estuary, bay or lagoon that separates the island from the mainland. Barrier islands are popular tourist attractions and contain fragile ecosystems with distinct habitats and wildlife. Due to their location, barrier islands serve as protection from storms for the mainland.
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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 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 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 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 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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  • 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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  • 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 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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  • 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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  • 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 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 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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  • 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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  • 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 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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  • 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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