UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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thicker, with a less dense granitic composition
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thicker, with a more dense basaltic composition
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thinner, with a less dense granitic composition
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thinner, with a more dense basaltic composition
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Detailed explanation-1: -Continental crust is broadly granitic in composition and, with a density of about 2.7 grams per cubic cm, is somewhat lighter than oceanic crust, which is basaltic (i.e., richer in iron and magnesium than granite) in composition and has a density of about 2.9 to 3 grams per cubic cm.
Detailed explanation-2: -Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. It is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite.
Detailed explanation-3: -Answer and Explanation: Oceanic crust is denser than continental crust because it has a different composition. Oceanic crust is made of basalt, while continental crust is made of granite. Basalt is denser than granite.
Detailed explanation-4: -It is thinner than continental crust, or sial, generally less than 10 kilometers thick; however, it is denser, having a mean density of about 3.0 grams per cubic centimeter as opposed to continental crust which has a density of about 2.7 grams per cubic centimeter.