Comprehensive information about deep-ocean trenches. Includes maps, a video [1:29], and a vocabulary list.

Around 72 percent of the Earth's surface is found under the oceans. It has always been contributing to the dynamically changing face of the Earth through the tectonic phenomenon occurring at its depths. Such a naturally occurring...

Detailed information about oceanic trenches, their structure, and how they are formed. Discusses the twenty trenches that exist around the world. Includes several labeled illustrations.

A rather detailed explanation of how trenches form and why. No graphics, but some interesting explanations as well as links to other sites and extensive reference list.

The aphotic zone of the ocean receives less than one percent of sunlight penetration. It extends from between 200 to 1,000 m, or 660 to 3,300 ft, down to the seafloor. Learn about the characteristics of this zone and the adaptations the...

Students learn about James Cameron's Challenger Deep dive and about the marine animals that live in different layers of the ocean. They then study the characteristics of the hadalpelagic zone at the bottom of the ocean, and imagine and...