Final answer:
The Southern Hemisphere has more water than the Northern Hemisphere, which contributes to its climate being generally more moderate due to the heat capacity of water. The tilt and rotation of the Earth around the sun also cause seasonal variations in temperature.
Step-by-step explanation:
The variation in temperature across the Earth's surface is influenced by multiple factors including the different amounts of land and water in each hemisphere.
When considering which hemisphere has more water, it is the Southern Hemisphere that prevails in this respect. Large bodies of water, like oceans, have a moderating effect on climate due to water's high heat capacity, which allows it to absorb and release heat energy over time.
This can lead to milder climates in areas closer to oceans compared to those that are inland. Additionally, the Earth's tilt and rotation around the sun affect the intensity and angle of sunlight, leading to the different seasons across the globe, with direct sunlight causing warmer temperatures.