UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Both temperature and pressure increase.
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Both temperature and pressure decrease.
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Temperature decreases and pressure increases.
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Temperature increases and pressure decreases.
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Detailed explanation-1: -The mantle, which contains more iron, magnesium, and calcium than the crust, is hotter and denser because temperature and pressure inside the Earth increase with depth.
Detailed explanation-2: -Compared to the other layers of the Earth, Earth’s mantle is warmer than the crust but cooler than the core. As depth from the surface of the Earth increases, so too does the temperature. The range of temperature for the mantle is between 200 degrees Celsius to 4, 000 degrees Celsius depending on depth.
Detailed explanation-3: -At extremely high pressures, though, iron’s structure morphs into what’s called a hexagonal close-packed (HCP) phase, with each point surrounded by 12 other points. The pressure at Earth’s core, you might imagine, is extremely high-3.5 million times higher than the pressure you experience up here on the surface.
Detailed explanation-4: -Mantle: a semi-solid magma layer consisting of iron, magnesium, and silicon. Core: centrally located solid mass of metal (inner core) and a liquid mass of iron and nickel (outer core).