What percentage of the Earth's surface is covered by oceans?

The correct answer is that approximately 70% of the Earth's surface is covered by oceans. This significant proportion highlights the importance of marine environments in supporting biodiversity, regulating climate, and influencing global weather patterns. The vast bodies of water act as major carbon sinks, helping to moderate the planet's temperature and playing a critical role in the Earth's hydrological cycle. Understanding this prevalence of oceans is vital for comprehending environmental issues such as rising sea levels and ocean conservation efforts.