UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Density is highest in the crust, then decreases in the mantle and core.
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Density decreases as temperature increases in the mantle and core.
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Density increases as the weight of rocks above increases.
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Density increases and decreases depending on the type of the rocks in each layer.
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Detailed explanation-1: -Due to increase in pressure and presence of heavier materials like Nickel and Iron towards the centre, the density of earth’s layers also gets on increasing towards the centre. The average density of the layers gets on increasing from crust to core and it is nearly 14.5g/cm3 at the very centre.
Detailed explanation-2: -The least density is found in the earth’s crust and it gradually increases toward the center, that is the mantle is denser than the crust and the core is the densest part of the earth.
Detailed explanation-3: -Temperature and pressure progressively increase with increased proximity to Earth’s core. Recent studies indicate the core’s temperature may be close to 11, 000 degrees Fahrenheit; that’s nearly 2, 000 degrees warmer than previously thought and hotter than the surface of the Sun, according to a 2013 Forbes article.
Detailed explanation-4: -Air pressure and density work and change together as you enter different layers of the atmosphere. As the atmosphere expands the further you get from the Earth’s surface, it becomes less dense and air pressure decreases.
Detailed explanation-5: -The atmosphere and Earth’s interior are layered by density. Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth’s core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer.
Detailed explanation-6: -As depth increases, density increases, but temperature and pressure decrease.