How many tectonic plates does Earth have?

[admin]

The number varies from a dozen to almost 100 — and most of these don't even appear on official maps.

How many tectonic plates does Earth have? : Read more

 

[MarinTomuta]

Africa seems to be the most outward plate and Pacific seems to be the most inward plate.

 

[MarinTomuta]

If all above water continental plates broke apart ~250Mya what caused it?
Are we sure the moon didn't form ~250Mya?

I imagine an astroidal impact in the Pacific plate caused the continental plates to break apart and I imagine that astroid became the moon b/c the moon ~1.2% the mass of the Earth with a diameter ~¼ that of Earth's; moon is small.