The terms "the ocean" or "the sea" used without specification refer to the interconnected body of salt water covering the majority of Earth's surface, i.e., the world ocean. [9][10] It includes the Pacific, …

Oct 28, 2025 · Facts, Species, and Stories for Ocean Explorers The ocean is essential to life on Earth. It covers more than 70% of our planet and holds 96.5% of all water. It regulates our climate, generates …

Your top ocean questions, answered. Explore OCEARCH Ocean Facts to learn how seas regulate climate, generate oxygen, support biodiversity, and sustain us all.

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Ocean, continuous body of salt water held in enormous basins on Earth’s surface. There is one ‘world ocean,’ but researchers often separate it into the Pacific, Atlantic, Indian, Southern, and Arctic …

May 27, 2025 · This article is also available in Spanish. The ocean covers 70 percent of Earth 's surface. It contains about 1.35 billion cubic kilometers (324 million cubic miles) of water, which is about 97 …

Feb 19, 2025 · In contrast, ocean salinity averages 35 g/L. Depth similarly differs, with oceans typically deeper than seas. The Pacific Ocean’s Mariana Trench reaches over 11,000 m, while the deepest …

At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans.

Dive deep into the mysteries of marine life, the impact of human activity on Earth’s oceans, and the efforts to protect these vital ecosystems from threats including pollution, overfishing, and ...

Ocean Explorer is the perfect interactive ocean lesson for kids, students, and marine biology enthusiasts. Learn about ocean pressure, ocean temperature by depth, the ocean food chain, and …