Oceans

Earth's oceans cover approximately 71 percent of the planet's surface and are divided into five major bodies: the Pacific, Atlantic, Indian, Southern, and Arctic Oceans. The Pacific is the largest and deepest, containing the Mariana Trench, the deepest known point on Earth. Oceans regulate global climate, produce over half the world's oxygen, and support an extraordinary diversity of marine life. They are vital highways for international trade, with billions of tonnes of goods shipped annually. Ocean currents influence weather patterns worldwide. This sub-category tests knowledge of ocean geography - their sizes, depths, boundaries, key features, currents, and the crucial role they play in sustaining life and human civilisation.

This topic is part of Geography - use the map and continents tools below, then practice with flashcards and quizzes.