What is the term for the permeable rock or soil area that is totally filled with water?

What is the term for the permeable rock or soil area that is totally filled with water?

• A. Saturated zone
• B. Water table
• C. Aquifer
• D. Unsaturated zone

Answer: (A)

The key idea is groundwater zones: below the water table, the pore spaces in rocks or soil are completely filled with water. This region is called the saturated zone (also known as the zone of saturation). Its upper boundary is the water table, the surface where the pores just become fully saturated. The saturated zone is the correct term because it specifically describes the portion where all pore spaces are water-filled. The water table is a surface, not the entire permeable area. An aquifer is a body of permeable rock or sediment that can store and transmit groundwater, while the unsaturated zone lies above the water table and contains air in the pores.

The key idea is groundwater zones: below the water table, the pore spaces in rocks or soil are completely filled with water. This region is called the saturated zone (also known as the zone of saturation). Its upper boundary is the water table, the surface where the pores just become fully saturated. The saturated zone is the correct term because it specifically describes the portion where all pore spaces are water-filled. The water table is a surface, not the entire permeable area. An aquifer is a body of permeable rock or sediment that can store and transmit groundwater, while the unsaturated zone lies above the water table and contains air in the pores.