Oceans / Roumanis, Alexis

Describes the ocean ecosystem covering more than half of Earth's surface and home to the blue whale, the largest animal on Earth. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.

Gives close-up views of the ocean ecosystem and describes how marine plants and sea animals dwell underwater.

Describes the ocean ecosystem covering more than half of Earth's surface and home to the blue whale, the largest animal on Earth.