Which of the following occurs when an acid reacts with an active metal?
A) The metal is reduced.
B) The water is oxidized.
C) both a and b
D) neither a nor b
D
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Air descending leeward from the top of a mountain is most likely to
A) decrease in temperature and evaporate water from the soil. B) increase in temperature and evaporate water from the soil. C) decrease in temperature and result in precipitation. D) increase in temperature and result in precipitation.
Which of the following is the correct ordering of soil particle sizes from largest to smallest?
a. clay ? sand ? silt b. clay ? silt ? sand c. silt ? clay ? sand d. sand ? silt ? clay
________ is a supermassive black hole sitting in the galatic center of the Milky Way
A) Sagittarius A B) The Orion Spur C) Messier 31 D) Centaurus A
________ is any network of relationships among a group of components, which interact with and influence one another through the exchange of energy, matter, or information
A) An ecosystem B) An environmental collaboration C) Hierarchy D) An interchange E) A system