Question

why are there fewer natural regions natural in the southern hemisphere than those in the Northern hemisphere

Answer 1

Humanities › Geography
Geography of the Southern Hemisphere
Learn Important Facts about the Geography of Earth's Southern Hemisphere
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An image of much of the Southern Hemisphere from Antarctica. Cartesia/Getty Images
by Amanda Briney
Updated March 17, 2017
The Southern Hemisphere is the southern portion or half of the Earth (map). It begins at the equator at 0° and continues south into higher latitudes until it reaches 90°S or the South Pole in the middle of Antarctica. The word hemisphere itself specifically means half of a sphere, and because the earth is spherical (although it is considered an oblate sphere) a hemisphere is half.

Geography and Climate of the Southern Hemisphere
In comparison to the Northern Hemisphere, the Southern Hemisphere has fewer land masses and more water.

The South Pacific, South Atlantic, Indian Oceans and various seas such as the Tasman Sea between Australia and New Zealand and the Weddell Sea near Antarctica make up around 80.9% of the Southern Hemisphere. The land comprises only 19.1%. In the Northern Hemisphere, the majority of the area is composed of land masses instead of water.