Pressure...more so...gravitational compression and the decay of radioactive isotopes such as potassium.
The molten inner core of the earth.
A combination of gravity, bombardment by space 'debris' and internal geological activity mad the Earth what it is today.
tidal heating
You
The heat responsible for volcanic activity is essentially the magma within the mantle. Plate tectonics also a play a hug role in the formation of volcanoes, such as the plate boundary of which it was formed. The tectonics of the environment of which this volcano was derived will determine the way in which the magma/heat is formed.
The Contractor
Activity types are required for internal activity allocation and serve as tracing factors for costs and can be used to measure the internal activities, to enter them manually, automatically, or indirectly based on final costs, and to allocate them. sandhya
list two internal and external influnces on physical activity?
internal environment
Fluid located in the nucleus
management
high internal temperature