The photograph shown below is that of a water well casing in California. When groundwater was withdrawn, the ground surface dropped, leaving part of the well exposed above ground.
What likely happened to the porosity of the aquifer when this occurred?
A. Porosity did not change.
B. Porosity increased due to compaction.
C. Porosity decreased due to compaction.
Answer: C
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Gross primary productivity (GPP) is the rate at which
A. producers convert solar energy into chemical energy through photosynthesis. B. producers use chemical energy through aerobic respiration. C. producers manufacture chemical energy minus energy used through respiration. D. chemical energy is transferred from one trophic level to the next. E. consumers use chemical energy through respiration.
Heat is thermal energy that flows from
A. high energy to low energy. B. hot to cold. C. high thermal pressure to low thermal pressure. D. all of the above
Investment in improved transportation and communication systems is usually done with the intent to
A) increase economic growth. B) increase tax revenues. C) increase transportation costs. D) increase regional divides.
The sinking of the RMS Titanic fueled research that would change the science of bathymetry
Indicate whether the statement is true or false