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)
d - diameter (millimeters)
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Uncontaminated rain water has a pH of 5.6 (slightly acidic) because
A. oxides of sulfur are always present in the atmosphere, even from natural sources. B. upon condensation, water chemically reacts with carbon dioxide forming a weak carbonic acid. C. most water vapor originates by evaporation from the oceans and sea water is acidic. D. droplets of water necessarily condense on atmospheric particulate.
Earth's gravitational field extends
A) only above and beyond Earth's surface and cancels inside Earth. B) both inside and outside Earth and throughout the entire universe. C) neither A nor B
CO2 concentrations today are not any higher than they have been during past high points over the last 400,000 years
Indicate whether the statement is true or false
Sedimentary rocks are formed from igneous rocks beginning with the process of _____.
a. lithification b. weathering c. erosion d. transportation e. crystallization