What generally causes earthquakes?
A) break-up of the continents
B) motion of tectonic plates
C) the release of radioactivity from Earth's interior
D) global warming
B
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Rock sequences found on land that consist of deep-sea sediment, oceanic crust, and upper mantle are
called ____________________. These sequences are used to identify ____________________ plate boundaries. Fill in the blank(s) with the appropriate word(s).
A common Doppler radar signature associated with a supercell tornado is the
A) gust front. B) hook echo. C) shelf cloud. D) roll cloud.
Which climatic factor is described as the angle between the vertical and rotational axis?
A) the obliquity B) the eccentricity C) the precession D) the Milankovitch cycle
When did the Superfund law establish a fund for cleaning up hazardous waste dumps while holding polluters responsible?
A. 1965 B. 1970 C. 1975 D. 1980 E. 1985