Two halves in which Earth is divided are called _______________.
The Hemispheres of the Earth in geography and cartography refer to any division of the globe into two hemispheres. The most common such divisions are by latitudinal or longitudinal markers:
North-South
Northern Hemisphere, the half that is north of the equator
Southern Hemisphere, the half that lies south of the equator,
East-West
Eastern Hemisphere, the half that lies east of the prime meridian and west of the 180th meridian
Western Hemisphere, the half that lies west of the prime meridian and east of the 180th meridian