What is a main source of terrigenous sediments?
A) Volcanic eruptions
B) Rivers
C) Dust and ash
D) None of these choices
B
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Which of the following would be considered a homogeneous mixture?
A. sugar B. hydrogen cyanide C. rusty iron D. wine E. pretzel
Major events in Earth's history, such as major extinctions, determine the boundaries between the intervals in the geologic time scale
Indicate whether the statement is true or false
The average number of tornadoes per year is highest in ____
a. Oklahoma b. Kansas c. Texas d. Florida e. Nebraska
Which of the following is true about the 1993 upper Mississippi River flood and 1976 Thompson River flood?
A) Both floods lasted approximately the same amount of time. B) Both floods resulted from similar-sized storms. C) In both floods, most damage occurred on a broad floodplain adjacent to the river. D) None of these are correct.