The earth has four integrated subsystems that depend on one another. Study how the biosphere and hydrosphere interact by viewing videos based on data collected by NASA. This data shows the correlation between rainfall amounts...

Make Earth's climate livable by adding the right amount of air, water, and clouds to its surface and atmosphere.

The carbon cycle is one of the most important cycles. It is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. This cycle is important because it...

An overview of content about Earth and its atmosphere. The module was developed for middle school science teachers to provide background information for teaching the curriculum.

Using a surficial features map, students see the connections between those features and other Earth systems. They will consider the interactions of the geosphere, hydrosphere, biosphere, and atmosphere.

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),...