UNIVERSE
PLANETARY INTERIORS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Evidence from rock samples: Rocks from inside the earth give clues to geologists about the earth’s structure. Geologists have also drilled holes as deep as 12 kilometers into the earth so that they can bring up samples of rock.
Detailed explanation-2: -Answer and Explanation: Depending on the type of rock sample, geologists can learn the age of rocks within the Earth, the composition of minerals below ground, and what geologic forces were at work in the page. Igneous rocks containing radioactive isotopes can help to date rock layers found deep within the Earth.
Detailed explanation-3: -The geologists use two types of evidence to study the Earth’s structure: Rock samples as direct evidence. Seismic waves as indirect evidence.
Detailed explanation-4: -Volcanic eruptions are direct sources of information about the interior of the earth. As and when the molten material (magma) is thrown onto the surface of the earth, during a volcanic eruption it becomes available for laboratory analysis.