A marine environment covers the majority of the earth but is arguably the least understood. Teach young scientists about the characteristics of oceans and ocean species using an interactive online lesson. The in-person or remote learning...

This tutorial looks at the hydrosphere, that component of the earth that is liquid water such as rivers, streams, oceans, and so on.

Focus is on the hydrosphere and contains the definition as well as characteristics of the ocean and the effect of the ocean on climate.

Compilation of the Nature Conservancy's content about the ecology of oceans and coasts. Emphasis is on the biodiversity of these habitats and the human impact on the animal and plant life that live in our oceans and on our coasts.

Links to earth science sites, including safety tips, fun activities, general earth science information, and daily weather reports and more.

This is the home site for the non-profit organization Greenpeace. Greenpeace is an organization whose primary concern are threats to the planet's biodiversity and environment. The site provides links to news about the organization, a...

Simple discussion of plate tectonics and Pangaea. Includes maps and interactives.