Which statement describes percolation?

Which statement describes percolation?

• A. The upward movement of water through soil due to capillary action
• B. The downward movement of water through soil and rock due to gravity
• C. The process by which water evaporates from surfaces
• D. The movement of water along a slope as runoff

Answer: (B)

Percolation is the downward movement of water through soil and rock due to gravity. After water infiltrates the surface, gravity pulls it through the interconnected pores and fractures, sending it deeper into the soil and potentially recharging groundwater. This downward flow distinguishes it from capillary action, which can move water upward in small pores, as well as from evaporation (water turning into vapor) and runoff (water moving across the surface). The description that emphasizes gravity-driven downward movement through soil and rock best captures percolation.

Percolation is the downward movement of water through soil and rock due to gravity. After water infiltrates the surface, gravity pulls it through the interconnected pores and fractures, sending it deeper into the soil and potentially recharging groundwater. This downward flow distinguishes it from capillary action, which can move water upward in small pores, as well as from evaporation (water turning into vapor) and runoff (water moving across the surface). The description that emphasizes gravity-driven downward movement through soil and rock best captures percolation.