The energy of the vibrations or the magnitude of an earthquake is reported using the __________.
a. Seismograph numbers.
b. Richter scale.
c. Magnitude scale.
d. Bigone scale.
Ans: b. Richter scale.
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The U.S. Bureau of the Census has created a method of measuring the functional area of a city, known as:
A) the city-state B) the megalopolis C) the metropolitan statistical area D) the metropolitan influence zone E) the functional city limit
Mixing ethanol with gasoline makes the gasoline burn cleaner and is now required by most states.
Answer the following statement true (T) or false (F)
The El Niño begins to weaken and eventually terminates when
A) the leading edge of the cold Kelvin wave finally reaches the eastern coast of South America. B) cold water spreads out away from the equator, bringing warm upwelling waters from depth. C) cold water converges on the equator, bringing cold upwelling waters from depth. D) warm water spreads out away from the equator, bringing cold upwelling waters from depth.
Shields are ____
A)composed of igneous, sedimentary, and metamorphic rocks B)composed of sedimentary and metamorphic rocks C)composed of limestone and quartz D)regions of the continents where basement rocks are widely exposed E)regions of the continents where basement rocks are deeply buried