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.

This Classroom of the Future (COTF) website focuses on Earth science for kindergarten through 4th grade students. Topics covered include biomes (forest, desert, grassland, aquatic, tundra, chapparal), weather (seasons and climate), remote sensing (sonar and radar), and the Earth system (spheres and cycles). A teacher's section contains online and hands-on activities, and topic overviews. Full description.

This National Park Service resource contains information pages about cave safety and biology, how caves and speleothems form (stalactites and stalagmites), a glossary of karst and cave terms, and specific information about Round Spring Caverns in Missouri. The site also contains a number of K-12 classroom activities where learners apply both critical thinking skills and hands-on methodologies that ... Full description.

This is a series of interactive modules that explore the history of life on Earth, while focusing on the processes of science. Each module contains suggested lesson plans and an extensive teacher's guide. In addition, each module has a suggested grade level and an adaptable grade level. Full description.

This site is a collection of interactive, inquiry-based learning exercises for variety of science topics. Activities are grouped by category and include earthquakes and seismicity, global warming, absolute dating, hydrology, and biology. Earth science tutorials and online laboratory activities feature photographs, maps, diagrams, interactive graphs, and helpful illustrations and animations that make ... Full description.

Enchanted Learning hosts activities, information, labs, and data relating to all areas of science in the classroom. These include astronomy (Moon, Sun, comets, planets, solar system), biomes (desert, arctic, tundra, taiga, forests, oceans, grasslands), dinosaurs (anatomy, extinction, fossils, behavior), geologic time (eons, eras, periods, epochs), Earth (size, orbit), oceans (water cycle, ocean zones, ... Full description.