As viewed from space, the Earth appears beautiful and serene. As you well know, however, here standing on Earth, it's complicated! Complex, that is. And, it's constantly changing. Often changes on Earth happen so slowly it would be...

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water),...

Imagine our weather if Earth were completely motionless, had a flat dry landscape and an un-tilted axis. This, of course, is not the case; if it were, the weather would be much different. The local weather that impacts our daily lives...

Learn interesting information about the Earth, the largest of the "terrestrial" planets.

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

Human beings have an enormous impact on the natural environment, and ultimately on each other. The way we chose to house, clothe, shelter, and meet the needs for vital resources such as food, energy, and water, not only affect the...

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