The Doppler effect
A) is most useful in visible satellite imagery.
B) was discovered in the middle of the twentieth century.
C) results in an increase in emitted wave frequency when an object moves toward an observer.
D) results in a decrease in emitted wave frequency when an object moves toward an observer.
E) helps explain the formation of mirages.
C
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Increased volcanic activity may raise the temperature of the Earth enough to make the climate
warmer and more tropical. Indicate whether the statement is true or false.
In order to correlate age-equivalent rock units of dissimilar composition or to correlate rock units over
a large area, ____________________ and the principle of ____________________ must be used. Fill in the blank(s) with the appropriate word(s).
The ultimate source of geothermal energy is
A) the sun B) heat generated in the Earth's interior C) hydroelectric D) deeply buried biomass
Which of the following represents the largest and most important group of rock-forming minerals? The bulk of the crust of the Earth is composed of these minerals
A) Oxides B) Silicates C) Carbonates D) Native elements E) Sulfates