________ is formed when carbon dioxide dissolves in rainwater, and this mildly reactive substance aids chemical weathering
A) Carbonic acid
B) Hydrochloric acid
C) Clay
D) Limestone
Answer: A
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Which of the following is one of the major pollutants of groundwater?
A) acid rain B) fertilizers from agricultural fields C) treated sewage from cities D) carbon dioxide E) home garbage
Which of the following is NOT one of the four largest cities, with respect to population, of the North American region?
a. New York, U.S. b. Los Angeles, U.S. c. Chicago, U.S. d. Washington, U.S. e. Montreal, Canada
The most dangerous type of volcano is a
A) cinder cone. B) cinder cone whose magmas are interacting with groundwater. C) huge shield volcano. D) composite volcano.
Describe two ways of creating new attributes from the existing attributes in a data set.
What will be an ideal response?