Using what we know about thermal expansion, conduction of heat, and viscosity, should we expect thermal convection within Earth's core?
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The outer core consists mostly of liquid iron that has very low viscosity but is a very good conductor of heat. The high conduction prohibits convection from occurring. The inner core consists mostly of solid iron, which has high viscosity and is a very good conductor of heat. Its thermal expansion is slightly less than rocks. Most rocks have a volume-expansion coefficient in the range of 15–33 x 10-6 per degree Celsius. Iron is slightly lower, 10–12 x 10-6 per degree Celsius. Putting together all three factors makes it highly unlikely that convection occurs in the inner core.
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Fill in the blank(s) with correct word
Joints differ from faults primarily
A) with respect to the types of deformation that form them B) whether displacement has occurred C) with respect to strength of the rocks D) the amount of weathering to which they are prone
Magma can form up to 250 km deep in the Earth. If magma forms at such a depth, how can magma at that depth rise through the mantle and the crust toward the surface?
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The world soil map has strong resemblance to the world climate map. Discuss the reasons for the similarities and differences between the two maps
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