Which of the following statements concerning the Earth’s internal structure or heat transfer within the Earth is FALSE?
a)Although the asthenosphere is heat-softened and close to its melting stage, the outer core is the only liquid layer within the Earth.
b) The Earth can be subdivided into layers based on both composition (what layers are made of) and physical stage (how they behave).
c) Heat can transfer through the outer core by means of conduction (because it is metals) and convection (because it is liquid). Reversals in the Earth’s magnetic field do not drive plate tectonic motion, but indirectly led to the recognition of a mechanism for that motion.
d)Convection can only occur in liquids and gases, so conduction is the most important method of heat transfer through the Earth’s mantle.