Learn about the systems that make up Earth, and find out how they interact.

The plate tectonics and other features of the Earth's lithosphere are explained and illustrated. Has links to definitions of the magnetosphere, atmosphere, and hydrosphere.

This comprehensive study guide covers the main terms and concepts needed for an earth science unit on climate zones and biomes. Review questions are included at the bottom of the study guide.

See how atmospheric pressure affects air masses, which in turn affects the weather on Earth.

Compare weather here on Earth to other planets and moons in our solar system. You will find many similarities and differences.

This survey of the planets includes all the basics, size, mass, atmosphere, length of day, and the like. It features interactive activities and learning exercises and compares all of the planets in colorful tables.

See Earth's water cycle as a closed system, where all the water is cycled through the atmosphere.

This site from NASA lists and defines global wind patterns. It features a graphic of these patterns and a self-test with answers.