Here's why:
* Plate tectonics is driven by internal heat: The primary driver of plate tectonics is the heat from the Earth's core and mantle. This heat causes convection currents within the mantle, which in turn push and pull the tectonic plates.
* Radiation is primarily an external force: Radiation from the Sun or other sources plays a role in weather patterns, climate, and some surface processes. However, it does not penetrate deep enough into the Earth to significantly influence the mantle convection that drives plate tectonics.
* Radioactive decay contributes to Earth's internal heat: While radioactive decay within the Earth does contribute to the internal heat, it is not a primary driver of plate tectonics. The heat generated by radioactive decay is distributed throughout the Earth's interior and is not concentrated in areas where plate boundaries are active.
In summary:
Radiation plays a role in the Earth's climate and surface processes but does not directly influence the forces driving plate tectonics. The primary driver of plate tectonics is the internal heat from the Earth's core and mantle, which generates convection currents that move the plates.
