The term for a massive body of salt water is "ocean." Oceans cover approximately 71% of the Earth's surface and are divided into several major sections, including the Pacific, Atlantic, Indian, Southern, and Arctic Oceans. These vast bodies of water play a crucial role in regulating the planet's climate, supporting biodiversity, and influencing weather patterns. They serve as habitats for countless marine species, provide resources such as fish and minerals, and facilitate trade and transportation. The study of oceans, known as oceanography, helps scientists understand their dynamics and the impact of human activity on marine ecosystems.