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.

Which ocean is being considered for its own designation by some oceanographers?

• Pacific Ocean

• Atlantic Ocean

• Southern Ocean

• Indian Ocean

What percentage of the ocean remains unexplored?

• 90%

• 80%

• 60%

• 50%

Which of the following has been mapped more thoroughly than the ocean floor?

• The Sun

• The Moon

• The Sahara Desert

• The Amazon Rainforest

What is the name of one of the deepest trenches in the Pacific Ocean?

• Java Trench

• Mariana Trench

• Tonga Trench

• Puerto Rico Trench

Approximately how many ocean species are currently known to scientists?

• 1,000,000

• 500,000

• 225,000

• 100,000