info@bestmytest.com Looking for IELTS prep?

aquifer

Find out how TOEFL Tutor can help you improve your score free

definition: 
an underground layer of water-bearing rock. Water-bearing rocks are permeable
sentence: 
Groundwater is found at varying depths underneath the earth's surface, in permeable rocks known as aquifers which are saturated by the infiltration of rainfall.
difficulty: 
medium
toefl frequency: 
2
toefl classification: