Chemosynthesis is explained in this video. View some of the 300 species that inhabit ecosystems based on chemosynthesis occurring at hydrothermal vents. There is an additional interactive hydrothermal foodweb to check out as well.

The oceans are a source of renewable energy. Tidal energy, wave energy, thermal energy and methane hydrates are all described in this animation.

Watch a video depicting the formation of a mid-ocean ridge. The resource also has two additional lessons requiring you to apply your knowledge of mid-ocean ridge location and formation.

This learning module explores the effects trash, toxins, oil and sound pollution are having on our oceans. Includes two short videos along with a brief exploration and two interactives. A brief assessment follows each interactive.

Explore the geologic features called seamounts. This video explains where they are located and why they are inhabited with a great variety of organisms. An enrichment activity will challenge you to use radiometic dating to figure out the ages of corals growing on a seamount.

This video explains the process of subduction between two oceanic plates as well as a continental plate and oceanic plate. Links to two additional subduction activities are also available.