SOLAR SYSTEM

UNIVERSE

PLANETARY INTERIORS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the inferred pressure and temperature at the boundary of Earth’s stiffer mantle and outer core?
A
1.5 million atmospheres pressure and an interior temperature of 4950oC
B
1.5 million atmospheres pressure and an interior temperature of 6200oC
C
3.1 million atmospheres pressure and an interior temperature of 4950oC
D
3.1 million atmospheres pressure and an interior temperature of 6200oC
Explanation: 

Detailed explanation-1: -Estimates for the temperature of the outer core are about 3, 000–4, 500 K (2, 700–4, 200 °C; 4, 900–7, 600 °F) in its outer region and 4, 000–8, 000 K (3, 700–7, 700 °C; 6, 700–14, 000 °F) near the inner core.

Detailed explanation-2: -Answer and Explanation: At a depth of 2, 000 kilometers the temperature of the stiffer mantle is about 2, 300 degrees Celsius (4, 200 Fahrenheit). The mantle is the part of the earth that sits between the crust and the core.

Detailed explanation-3: -The pressure in the Earth’s inner core is slightly higher than it is at the boundary between the outer and inner cores: It ranges from about 330 to 360 gigapascals (3, 300, 000 to 3, 600, 000 atm).

Detailed explanation-4: -The lower mantle refers to the layer between the outer core and asthenosphere. It makes up 55% of Earth by volume and experiences pressure from 237, 000 atm to 1.3 million atm towards the outer core. Heat and pressure in the lower mantle are much greater than in the upper mantle.

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