An instrument that measures P and S waves produced by earthquakes is a(n) _______________
Fill in the blank(s) with correct word
seismograph
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The leading cause of preventable death each year in the U.S. is
A. smoking. B. accidents. C. illegal drug use. D. pollutants. E. homicides.
Viral abundance is strongly correlated with plankton biomass.
Answer the following statement true (T) or false (F)
Match the type of glacier with the correct definition
A) A long, narrow glacier that flows downslope B) A broad lobe that spreads out to flow on an open plain C) A small, round glacier at the head of a valley D) A large, massive glacier that moves independently of the topography 1) Valley glacier 2) Cirque 3) Piedmont glacier 4) Ice sheet
Silicates most commonly form ________
A) under extreme pressure B) at the surface of the earth C) from cooling molten rock D) from other silicates