How is electricity generated from hydroelectric dams or ocean tides?
A. Water piles up behind a dam or tidal barrier and flows down because of gravity.
B. Water is pumped upward and then back down.
C. Turbines are used to pump the water upward and generators produce the electricity.
D. All of these choices are correct.
Answer: A
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The pH value of a solution decreases with increasing concentrations of hydrogen ions.
Answer the following statement true (T) or false (F)
In the diagram below, A is the
A) hadal zone.
B) mesopelagic zone.
C) epipelagic zone.
D) benthic zone.
Which of the following federal laws deals with the clean-up of hazardous waste sites?
A. Toxic Substance Control Act (TSCA) B. Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) C. Resource Conservation and Recovery Act (RCRA) D. Hazardous Materials Transportation Act (HMTA)
Energy consumption can be reduced by all of the following except ________
A) purchasing only energy-efficient lighting B) purchasing energy-efficient light bulbs C) using your car instead of mass transit D) turning off unused lights E) buying a more energy-efficient furnace for your home