This site describes the distribution and movement of water around, through, and above the Earth as water vapor, liquid water, and ice, with emphasis on the water cycle (hydrologic cycle). It is part of the U.S. Geological Survey's Water Science for Schools website. Tables and graphs are provided. The water cycle graphic is available in several languages. Full description.

This page of text, from the US Geological Survey's Geology in the Parks website, discusses the difference between weathering and erosion. Full description.

Visitors to this site can access a brief description of what a well is and how it works. Topics include the basic types of wells, well construction, and tips on preventing contamination of wells. Full description.

Kids can explore environmental science topics using satellite imagery and NASA data. Materials presented here explain how people affect the Earth and how NASA studies land, water, the atmosphere, and natural hazards from space. Factoids which change every few minutes are presented, and kids can send postcards featuring NASA images to their friends. Full description.

This secondary-level educational program in Earth Sciences includes an extensive selection of student learning materials, teacher resources, and assessment tools for a hands-on, inquiry-driven instructional program. Module topics include Earth's geosphere (volcanoes, earthquakes, plate tectonics), understanding your environment (landscape evolution, river systems, land use), Earth's fluid spheres ... Full description.

NASA's Visible Earth is a searchable directory of images, visualizations, and animations of the Earth. The images are also listed under the following categories: agriculture, atmosphere, biosphere, cryosphere, human dimensions, hydrosphere, land surface, oceans, radiance or imagery, solid earth, locations, and satellites. Accompanying each image are credits, data about the image, the satellite it ... Full description.