Continent entirely in the Southern Hemisphere: Antarctica

Antarctica is the continent that is entirely located in the Southern Hemisphere. It is the southernmost continent and is primarily covered by ice. Here is an explanation of why Antarctica fits the given criteria:

1. Location in the Southern Hemisphere:
- The Earth is divided into four hemispheres: Northern, Southern, Eastern, and Western.
- The equator is the imaginary line that divides the Earth into the Northern and Southern Hemispheres.
- Antarctica is entirely located south of the equator, making it part of the Southern Hemisphere.

2. Geographic Features of Antarctica:
- Antarctica is the fifth-largest continent, covering an area of about 14 million square kilometers.
- It is almost entirely covered by ice, with ice sheets that are several kilometers thick.
- The Antarctic ice sheet is the largest single mass of ice on Earth.
- The continent is known for its harsh and extreme climate, with temperatures regularly dropping below -50 degrees Celsius (-58 degrees Fahrenheit).

3. Unique Environmental Conditions:
- Antarctica is home to the South Pole, which is located near the center of the continent.
- It experiences six months of continuous daylight during summer and six months of continuous darkness during winter due to its proximity to the South Pole.
- The continent also experiences strong winds, known as katabatic winds, which can reach hurricane-like speeds.

4. Absence of Permanent Human Population:
- Unlike other continents, Antarctica does not have a permanent human population.
- It is primarily used for scientific research and is governed by the Antarctic Treaty System, which prohibits any military activity, mineral mining, and nuclear testing.
- However, temporary research stations are established by various countries for scientific purposes.

In conclusion, Antarctica is the continent that is entirely situated in the Southern Hemisphere. Its unique geographical features, extreme climate, and absence of permanent human population make it a fascinating and isolated part of the world.