What fraction of the Earth is covered in water?

The correct fraction of the Earth covered in water is approximately 71%, which is typically rounded to 70% in many contexts. This encompasses all bodies of water, including oceans, seas, lakes, rivers, and glaciers. Oceans alone account for about 96.5% of all Earth's water, which is why the figure appears so high. The significant portion of Earth's surface covered by water plays a crucial role in climate regulation, supporting biodiversity, and providing resources for human activities.

The percentages above or below this commonly accepted figure suggest variations that do not reflect the generally recognized statistics regarding Earth's hydrosphere. Understanding that around 70% of the Earth's surface is water helps in grasping the vital role water plays in sustaining life and influencing global systems.