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Line 40:
Line 40: − [[File:Figure 1.png|200px|thumbnail|right|Figure 1: Remaining heat and radioactive heat [http://www.mpoweruk.com/geothermal_energy.htm].]] − + − See Figure 1+
→Sources of internal heat
|competition=June 2015
|competition=June 2015
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=== Remaining heat and radioactive heat ===
=== Remaining heat and radioactive heat ===
* '''Geothermal Gradient''' is the variation of temperature according to a rock's depth. It is read in Celsius or Fahrenheit grades by the unit of vertical distance.
* '''Geothermal Gradient''' is the variation of temperature according to a rock's depth. It is read in Celsius or Fahrenheit grades by the unit of vertical distance.
* '''Surface Heat Flow''' is the heat that continuously comes up to the surface. It is read in joules per second. It is estimated that the average is 42 x 1012 J/sec and has two different sources:
* '''Surface Heat Flow''' is the heat that continuously comes up to the surface. It is read in joules per second. It is estimated that the average is 42 x 1012 J/sec and has two different sources:
** '''Remaining heat release''': 34 x 1012 J/sec. It comes from the [[mantle]] and the nucleus and is the heat remaining after the formation of the planet.
** '''Remaining heat release''': 34 x 1012 J/sec. It comes from the [[mantle]] and the nucleus and is the heat remaining after the formation of the planet.
** '''Radioactive heat release''': 8x1012 J/sec. It comes from the [[crust]] and is produced by the fission of radioactive isotopes.
** '''Radioactive heat release''': 8x1012 J/sec. It comes from the [[crust]] and is produced by the fission of radioactive isotopes. See [[:File:Figure 1.png|Figure 1]]
[[File:Figure 1.png|center|{{figure number|1|}}Remaining heat and radioactive heat [http://www.mpoweruk.com/geothermal_energy.htm].]]
=== Igneos phenomena ===
=== Igneos phenomena ===