Atmosphere- a layer (or layers of gases) surrounding a planet
Hydrosphere-the total amount of water on a planet.
cryosphere-the frozen water part of the Earth system.
·Biosphere- a global ecosystem which consists of living organisms (biotic) and the abiotic (nonliving)
Geosphere-the portion of the Earth system that includes the Earth's interior, rocks and minerals, landforms and the processes that shape the Earth's surface.
