A low pH, such as 2, means
A. a low concentration of hydrogen ions.
B. basic conditions.
C. a high concentration of hydrogen ions.
D. alkaline conditions.
Answer: C
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What two weather conditions contribute to climate classifications? What role does vegetation play in classifying climates?
What will be an ideal response?
The age of the universe is estimated by the:a
temperature of the universal background radiation. b. age of comets formed in interstellar space. c. rate at which galaxies are moving away from one another. d. age of subatomic particles as determined by radioactive decay. e. age of the sun.
The piling up of air above a region is called thickening
a. true b. false
If you had this type of deformation of a region, it would
A. thin the crust and cause subsidence. B. thicken the crust and cause subsidence. C. thin the crust and cause uplift. D. thicken the crust and cause uplift. E. None of these choices are correct.