Oceans

The video discusses the vastness and mystery of Earth's oceans, highlighting that the Pacific, Atlantic, Indian, and Arctic are regions of a single global ocean. It introduces the debate over the Southern Ocean's designation. Despite covering 97% of Earth's water, over 80% of the ocean remains unexplored, with more known about the Moon and Mars. Oceanographers have discovered underwater mountains and trenches, such as the Mariana and Philippine trenches, which are deeper than Mount Everest is tall. The ocean's biodiversity is immense, with over 225,000 known species and potentially millions more undiscovered.

What are the names of the four major oceans mentioned in the text?

What percentage of the ocean has never been mapped or explored?

What significant feature of the ocean is mentioned that is similar to canyons?

How do the depths of the Mariana and Philippine trenches compare to Mount Everest?

What is the estimated number of undiscovered ocean species according to scientists?