True or false: Pressure and density always decrease with height in the atmosphere. Why?
What will be an ideal response?
Answer: True; Air is compressible.
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The most likely conditions under which ripple marks form are:
a) Hot and dry with little rain and lots of evaporation (desert) b) Beach or tidal flat with shallow water flowing over the sand c) Deep ocean d) Swampy and boggy environment under tropical or temperate climate e) Some environment where mud can periodically get wet and dries out again
The collision efficiency:
A) is approximately one regardless of drop size. B) is affected by the compression of air just below the collector drop. C) is governed primarily by the temperature of the air. D) is highest for droplets of equal or nearly equal size.
The interiors of glaciers are made up of ice that is
A) soft and compact. B) hard and compact. C) soft and porous. D) hard and porous.
As a stream-related measure, competence is expressed as a _______.
a - velocity (meters per second) b - discharge (cubic meters per second) c - gradient (meters per kilometer) d - diameter (millimeters) e - time (seconds)