SETTLING NORTH AMERICA 1497 1732
NORTH AMERICAN EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It lowered the water level, causing the Land Bridge to be covered.
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It had no impact on the level of water in the ocean.
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It raised the water level, causing the Land Bridge to be covered.
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It lowered the water level, causing the Land Bridge to be seen.
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Detailed explanation-1: -Around this time, Hu notes, something else happened: As the ice sheets that covered North America and northern Eurasia snatched up more and more of Earth’s water, global sea level dropped to about 50 meters lower than it is today. That exposed a broad strip of land that connected what is today Alaska and Siberia.
Detailed explanation-2: -During cold-climate intervals, known as glacial epochs or ice ages, sea level falls because of a shift in the global hydrologic cycle: water is evaporated from the oceans and stored on the continents as large ice sheets and expanded ice caps, ice fields, and mountain glaciers.
Detailed explanation-3: -During the peak of the last ice age, known as the Last Glacial Maximum, the low sea levels exposed a vast land area that extended between Siberia and Alaska known as Beringia, which included the Bering Land Bridge.
Detailed explanation-4: -The Bering land bridge, also called Beringia, connected Siberia and Alaska during the late Ice Age. It was exposed when the glaciers formed, absorbing a large volume of sea water and lowering the sea level by about 300 feet.
Detailed explanation-5: -Answer and Explanation: Rising sea levels caused the disappearance of land bridges. As Earth exited the Ice Age, the temperature became much warmer and water that had previously been locked in glacier ice melted and ran into the ocean.