subsystems of the earth the four subsystems of the earth are: 1. Atmosphere - the gaseous layer above the earth's surface primarily composednof different gases suvh as nitrogen and oxygen. 2. Biosphere - the zone of the earth where all form of life exist. this serves as the ecosystem of all living and non- living organisms. 3. Geosphere -the solid part of the earth that consists the entire planet from the center of the core to the outer crust. it includes core, mantle, and crust of the earth 4. hydrosphere - the water part of the earth that includes oceans and glaciers.​