Each silicon-oxygen tetrahedron in single-chain silicate minerals shares:
a) No oxygen atom
b) Two oxygen atoms
c) Alternating two and three oxygen atoms
d) Three oxygen atoms
e) Four oxygen atoms
Ans: b) Two oxygen atoms
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Which of the following statements about leachate is false?
a. Leachate is also known as garbage juice with a moderately uniform composition. b. Leachate should be considered dangerous to the environment until established otherwise. c. Contaminant plumes of leachate can extend up to kilometers from their source. d. The size and shape of leachate contaminant plumes are related to groundwater flow velocity. e. Leachates are classified based on the chemical reactivity and/or density of the leachate.
The population of the Middle East and North Africa region is approximately
a. 500 million. b. 300 million. c. 700 million. d. just over 1 billion. e. almost 2 billion.
When water evaporates from a surface, which of the following occurs?
A) Energy is released to the surface. B) The surface is warmed. C) Heat is transferred back and forth between the air and surface. D) Energy is stored within the water.
Match the term or phrase with the best descriptor. Not all answers will be used. Oil and natural gas