Author Question: The boundary between the zone of aeration and the zone of saturation is known as the ... (Read 129 times)

Yolanda · **on:** Jul 15, 2018

The boundary between the zone of aeration and the zone of saturation is known as the
___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

An impermeable layer that prevents the passage of groundwater is a(n) ___________________ _. Fill in the blank(s) with the appropriate word(s).