Hemispheres

• A hemisphere is half of a spherical body.
• The Earth is split into 2 pairs of hemispheres.
  
• These are the North and South hemisphere, and the East and West hemisphere.
  
• The North and South hemispheres are split at the equator line.
• The East and West hemispheres are split at the prime meridian.
  

Sources

https://en.wikipedia.org/wiki/Hemispheres_of_Earth