♻️ap environmental science review

Aquifers

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Aquifers are underground layers of permeable rock or sediment that hold and transmit water. They act as natural storage tanks, providing a source of freshwater for wells and springs.