The percentage of a material's volume that is pore space is called:
a. permeability
b. porosity
c. transmissivity
d. storage
Answer: b. porosity
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In terms of momentum, why is a glass less likely to break if it falls on a carpeted floor compared with falling on a hard concrete floor?
What will be an ideal response?
The primary cause of BP's Deepwater Horizon oil spill in the Gulf of Mexico was ____.
A. faulty equipment and poor decision-making B. a tsunami C. an earthquake D. the oil rig crashing into an underwater reef E. leakage from old, rusty pipes
In which of the following atomic particles is the number of protons not equal to the number of electrons?
a. ion b. atom c. isotope d. neutron
The thermocline is the layer in a lake at which
A. Nutrient levels are the lowest B. The warm upper zone meets the cold lower zone C. Seasonal lake mixing occurs D. Light no longer penetrates enough for photosynthesis to occur E. Pollutants are trapped and held