Which sphere includes oceans, rain, and rivers?

• A. The biosphere.
• B. The atmosphere.
• C. The cryosphere.
• D. The hydrosphere.

Answer: (D)

Earth's systems are described by different spheres that hold or involve different substances. The hydrosphere is the part that contains all water—oceans, rivers, lakes, groundwater, and even water in the atmosphere as vapor and precipitation. Oceans are large bodies of liquid water, rivers are flowing freshwater, and rain is water in the cycle that returns to the surface; all of these are part of the Earth's water domain. The cryosphere covers solid water like ice and snow, the atmosphere is the gaseous layer where water exists as vapor, and the biosphere includes living organisms. So oceans, rain, and rivers all fit best in the hydrosphere.