This resource extensively studies the concepts in a very user-friendly format for students.
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
NASA.gov brings you images, videos and interactive features from the unique perspective of America's space agency.
The Smithsonian Museum of Natural History presents articles about gems, minerals, rocks, mining, earth movements, volcanoes, and materials from other disciplines in Earth Science.
Map and data on recent earthquakes around the world.
The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it.
PhET: Free Online Physics Simulations
Fun, interactive, research-based simulations of physical phenomena from the PhET™ project at the University of Colorado.