The Extraordinary World of Mid-Ocean Ridges
In The Extraordinary World of Mid-Ocean Ridges, narrator Sir David Attenborough explains the mid-ocean ridges and what explorers have learned about this ecosystem. Watch undersea vents and Pompeii tube-worms in the mid-ocean ridges. This video is excerpted from BBC’s Blue Planet, a definitive documentary series diving into the mysterious depths of the sea to discover the natural history of the world’s oceans and the rarely seen marine life that reside there.
Lesson Express
Q: What is special about the mid-ocean ridges?
A: They are the largest geological structures on the planet.
Q: How long do the mid-ocean ridges stretch?
A: They mid-ocean ridges stretch for more than 28,000 miles.
Q: Why doesn’t the hot water coming out of the vents become steam?
A: The pressure of the ocean keeps it a liquid at temperatures as hot as 752°F (400°C).
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