Which of the following is NOT one of the earth's hemispheres?
a. Northern Hemisphere
b. Eastern Hemisphere
c. Southern Hemisphere
d. Southwestern Hemisphere
We can divide the Earth into two vertically, giving us Northern and Southern Hemisphere or Horizontally - Eastern and Western Hemisphere.
Since we have all the four hemipsheres (Northern and Southern Hemisphere and Eastern and Western Hemisphere) we know which one isn't a hemisphere: d. Southwestern Hemisphere