Internal Pressures of Earth ```Name: Natalie Status: Student Grade: 9-12 Location: N/A Country: United States Date: Fall 2009 ``` Question: What is the pressure of the earth's outer core? What is the pressure of the earth's mantle? What is the pressure of the earth's crust? Replies: Natalie Pressure: Earth's outer core: I actually am not sure about this one. It ranges between 140 GPa and 330Gpa, but not exactly. Earth's inner core is about 330 to 360 GPa. Earth's mantle:The base of the Earth's mantle is about 140 GPa. At about 700km depth the pressure is about 25 GPa. 11GPa at 380 km depth, and about 3 GPa at 100km depth. Earth's crust: varies with depth, P=gpz, where g is the gravitational field intensity, z is depth, and p is density. The average density of the continents is about 2.7 g/cm^3. The depth of the continents can be up to about 70km. The average density of the oceanic crust is about 3.0 g/cm^3. The depth of the oceanic crust is about 10km. So, the crust ranges from about 1 kPa to about 25 kPa at the deepest parts. Kim Adams Click here to return to the Environmental and Earth Science Archives

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