The effects of land subsidence due to groundwater extraction are generally ____.
a. problems for a period of months, until more groundwater seeps in to deep clays
b. permanent and irreversible
c. in effect for several years, until major storms irrigate the area
d. reversible by returning water to the aquifer
e. unpredictable and impossible to plan for effectively
Question 2
The uneven, potholed surface of karst is caused by ____.
a. erosion from ancient streambeds
b. the pattern of deposited material from glaciers
c. hardening of volcanic ash into tuff
d. swelling due to the absorption of water
e. the dissolution of the surface in the presence of acids
Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
Groundwater Resources
Effects of a Targeted Deletion of the μ Opiate Receptor
Change in Annual Precipitation Over Land, 1901-2010
Use the answer sheet below the problems for your answer
A land snail (Helix aspersa) with the opening that leads to its lung visible at the left.