A hemisphere is half of a sphere. The Earth is divided at the Equator into the Northern and the Southern Hemispheres. And at the poles into the Western and Eastern hemispheres.
The continents in the eastern hemisphere are ...Completely:AsiaAustraliaPartly:EuropeAfricaAntarcticaNorth America
it is in the northern heimsphere but sometimes moves
Europe and North America are the two continents that are completely in the Northern Hemisphere.