Students review a video showing how the ocean is warmed by solar energy. This is the first video of a four-part series on the water cycle, which follows the journey of water from the ocean to the atmosphere, to the land, and back again to the ocean.

Background information on ocean circulation.

Students explore positive feedback effects of changing albedo from melting Arctic sea ice.

Background information on the El Nino Southern Oscillation or ENSO.

Phytoplankton distribution background information.