Which term describes water that flows over the ground surface rather than soaking into the ground?

Prepare for your Environmental Science Exam 1 with our interactive quiz. Test your knowledge with various question types featuring detailed explanations. Start today and ace your exam!

Multiple Choice

Which term describes water that flows over the ground surface rather than soaking into the ground?

Water that flows over the ground surface rather than soaking in is runoff. It happens when rainfall is intense or the surface is already saturated or impervious, so the soil can’t absorb the water fast enough. Gravity pulls the water downhill, creating sheet flow or tiny channels that can join into streams and rivers. Infiltration is the opposite process—water soaking into the soil. Evaporation and condensation involve changes between liquid and vapor phases at the surface or in the air, not the movement of liquid water across the land’s surface. Runoff is a key part of surface water dynamics, linking rainfall to streams, erosion, and nutrient transport.

Water that flows over the ground surface rather than soaking in is runoff. It happens when rainfall is intense or the surface is already saturated or impervious, so the soil can’t absorb the water fast enough. Gravity pulls the water downhill, creating sheet flow or tiny channels that can join into streams and rivers. Infiltration is the opposite process—water soaking into the soil. Evaporation and condensation involve changes between liquid and vapor phases at the surface or in the air, not the movement of liquid water across the land’s surface. Runoff is a key part of surface water dynamics, linking rainfall to streams, erosion, and nutrient transport.

More practice questions