Heat Flow

Question 1

Heat sources

Answer 1

• Old heat from accretion and differentiation

* New heat from radioactivity and solar radiation

Question 2

Methods for Heat transfer

Answer 2

• Radiation-Electromagnetic waves directly transport heat.
• Conduction-Transfer of heat through material from particle to particle
• Convection-Transfer of heat by actual movement of matter

Question 3

Primary method for heat transport within the earth?

Answer 3

Mantle convection

Question 4

heatflux

Answer 4

heat loss/area/time

Question 5

Thermal evolution of oceanic lithosphere

Answer 5

a. Oceanic lithosphere is formed by cooling of magma
b. As the new lithosphere cools, the rate of heat loss
diminishes over time
c. Plate sinks due to increase density from thermal
contraction