The atmosphere is unaffected by changes in the geosphere.

False.

Biogeochemical cycles can affect every sphere in the earth because these spheres are interdependent.

The biogeochemical cycles move through mainly the biotic and abiotic components of the earth, more elaborately the spheres - biospheres, lithosphere, hydrosphere and atmosphere regions of the ecosystem. These biogeochemical cycles, from its terminology and discernable word morphology - involves the biological, geological and chemical components that make out to complete an exact and purposed cycle.