SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Caves
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Underground Mining Tunnels
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Builidings
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Satellites
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Detailed explanation-1: -cave, also called cavern, natural opening in the earth large enough for human exploration. Such a cavity is formed in many types of rock and by many processes.
Detailed explanation-2: -What is a National Natural Landmark (NNL)? It is a natural area that has been designated by the Secretary of the Interior in recognition that the site contains significant examples of the nation’s biological and/or geological features.
Detailed explanation-3: -Mammoth Cave National Park preserves the world’s longest known cave system. Mammoth Cave is a limestone labyrinth with more than 400 miles of it explored, and the park estimates a potential for another 600 miles in its system.
Detailed explanation-4: -A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground.