Each of the Earth's spheres is considered a system with unique cycles yet each sphere interacts with other spheres on Earth.

Question

Quizplus · Accepted Answer

Each of the Earth's spheres - geosphere, hydrosphere, atmosphere, and biosphere - has its distinct cycles such as the water cycle, rock cycle, nitrogen cycle, carbon cycle, and so on. However, these spheres are not isolated from each other, and there are ongoing interactions and exchanges between them such as the exchange of carbon dioxide between the atmosphere and biosphere through photosynthesis and respiration, the movement of water and nutrients from the hydrosphere to the biosphere, and the weathering of rock in the geosphere affecting the composition of the oceans. Thus, Earth's spheres are interdependent, and the interactions between them make the planet a complex and dynamic system.

Each of the Earth's Spheres Is Considered a System with Unique