A hurricane demonstrates sphere interaction by which description?

• A. Forms in the atmosphere
• B. Forms in the atmosphere, moves across the hydrosphere, damages the geosphere and biosphere
• C. Only damages biosphere
• D. Affects cryosphere

Answer: (B)

Sphere interaction means a phenomenon engages multiple Earth systems. A hurricane forms in the atmosphere, but its energy comes from warm ocean water, tying it to the hydrosphere. As it moves, it interacts with the ocean, coastlines, and land, affecting the geosphere through storm surge, erosion, and damage to soils and rocks, and it impacts the biosphere by harming habitats, crops, and living organisms. This description—forming in the atmosphere, drawing energy from the hydrosphere, and damaging the geosphere and biosphere—best shows how a single event spans several spheres. It’s not primarily about the cryosphere, and describing it as only atmospheric, or only biospheric, misses these important connections.