There are actually 7 continents not 6.
The earth's crust floats on earth's mantle and the crustal is moved round the planet by convection currents in the mantle.
Sometimes the bits of the crust are brought together into a super continent (this has happened in the past and this continent was called 'Pangaea') and sometimes the crust break up into bits and become separated - this is the condition at present.
Thus the answer to your question is :- there are 7 continents because the mantle convection has broken the crust up into 7 bits at the moment.
North America, Europe, Asia, and parts of Africa are located in the Northern Hemisphere.
Africa, Australia, and Antarctica are continents that are both in the eastern and southern hemispheres.
There are no continents in Africa, Africa is a continent.
Europe, North America, and Antarctica are each in both the eastern and western hemispheres.
North America, Asia, Europe, and Africa
Europe.
Asia
5
none
The five contenents are : Australia Africa Europe Asia America
Asia and north America
Australia
Antarctica.
Egypt is in Africa, which is a contenent.
The five contenents
The mantle.
Antarctica has no land.