To correctly monitor horizontal changes in air pressure, the most important correction for a mercury barometer measurement is the correction for ____
A) temperature
B) altitude
C) density
D) gravity
B
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Columnar jointing in lava flows occurs due to ____
A)pyroclastic welding B)basaltic crystal formation C)contact of the lava flow with sea water D)the expansion of lava flow materials E)cooling and contracting of lava flows
On a large urban or industrial scale, biogas can be produced
A) by using crushed fresh corn in an aerobic tank. B) from municipal wastewater treatment, landfills and food waste. C) using enzymes to degrade cellulose to glucose and then fermenting. D) drilling into areas adjacent to petroleum deposits.
When the upper-air exhibits a general ________ flow, cyclonic systems tend to move through quickly, creating rapidly changing weather conditions
A) West to East B) West to South C) North to East D) North to South
The Aral Sea provides a good illustration of international cooperation in water-resource management, with the additional benefit of enhancing commercial fishing opportunities.
Answer the following statement true (T) or false (F)