Approximately what percentage of Earth's surface is covered by water?

About 70% of Earth's surface is covered by water, which encompasses oceans, seas, rivers, lakes, and other bodies of water. This significant portion highlights the importance of water in various environmental processes, climate regulation, and supports the diverse ecosystems found in aquatic habitats. Understanding this percentage is crucial for water resource management and conservation efforts, particularly for water operators who need to be aware of the water supply and its sustainability.

The choices indicating lower percentages, such as 50% and 60%, understate the actual coverage and demonstrate a common misconception among those unfamiliar with Earth's geography and hydrosphere. The option suggesting 80% exceeds the scientifically accepted figure, illustrating the variance in knowledge about the distribution of water on our planet. Thus, recognizing that approximately 70% of Earth's surface is water is essential for effective education and awareness in water management practices.