The tsunami that struck northern Japan in March 2011 began when a rupture along a submarine fault
uplifted the sea surface by as much as 6 meters. Indicate whether the statement is true or false.
ANS: T
As the earth’s crust was displaced (upward) gravity pulled the water crest downward and an
oscillating ocean surface generated progressive waves that radiated from the epicenter of the
earthquake in all directions. The Japan event was the fourth largest earthquake ever recorded and is
associated with subduction. Water Displacement Causes Tsunami and Seismic Sea Waves.
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Polaris is always directly overhead at
A. the equator. B. any location north of the equator. C. the north pole.
High salinity is due to :
A) fish sweat B) precipitation exceeding evaporation C) evaporation exceeding precipitation D) both b and c
A body or rock of considerable thickness with characteristics that distinguish it from adjacent rock units is called a(n)
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