continental drift :D
This single landmass was the supercontinent of Pangea. They separated due to continental drift.
a continental theory
continental drift
Europe and Asia are both a part of Eurasia.Even larger, Africa, Europe, and Asia are all a part of Afroeurasia.
The US is not a continent because it is only a country and not a major landmass on the Earth. Mexico, Canada and all of Central America is part of that landmass too.
All of them except for Antarctica.
North America and South America = America Europe, Africa, and Asia = Afro-Eurasia
all except Australia i think.
Wegener's theory - Continental drift
Europe and Africa
Europe and North America.
Africa ,Europe, Asia,north america,are all in the northern hemisphere.