The Ogallala aquifer underlies the ____
a. Rocky Mountains
b. Appalachian Mountains
c. Florida peninsula
d. Great Plains
d
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Which of the following best describes the solute effect?
A. Cloud droplets evaporate and ice crystals grow in a cold cloud. B. Pollutants are removed from the atmosphere by cloud droplets. C. Water droplets are kept from freezing at temperatures below 0°C. D. Dissolution of hygroscopic nuclei occurs as does condensation at relative humidities less than 100 percent.
Basalt cooled from ____________________, whereas granite cooled from ____________________
Fill in the blank(s) with correct word
Which of the following explains the unusually high melting points of amino acids?
A) their formula weights B) the polarity of the side chains C) the presence of nitrogen atoms D) their existence as zwitterions
An important characteristic of aquatic dead zones is a ________
A) high concentration of organisms resulting in extreme competition and finally the death of most B) low concentration of oxygen C) high concentration of urban development D) low concentration of nitrogen and phosphorus nutrients E) low concentration of keystone species