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Radioactive decay!
Inner core Outer core Mantle Crust Hydrosphere Atmosphere
Crust Mantle Core Inner Core
The coolest layer is the crust. The crust is on the surface of the earth (where we are). The further you go down the hotter it gets, the inner core that is at the center of the earth is as hot as the surface of the sun!
The closer the layer is at the Earth's core, the warmer it gets.
The pressure would decrease as you moved from the core to the crust.
Radioactive decay!
Radioactive decay!
Radioactive decay!
In general, the temperature decreases towards the surface.
Pressure and radioactivity.
both temperature and pressure increase
Both temperature and pressure increase.
The temperature increases. The average geothermal gradient is 25C/Km
Inner core Outer core Mantle Crust Hydrosphere Atmosphere
The mantle. Molten rock, but not as high of a temperature as the actual core.
It increases. The closer you get to the Earth's core - the higher the pressure (and temperature).