Which of the following statements is NOT true regarding artificial levees?
A. raises the height a stream must reach before overflowing its banks
B. can be made of concrete or earthen materials
C. creates the potential for catastrophic flood in areas downstream
D. makes flooding worse in areas upstream
E. used to help keep the channel straight so water flows faster
Answer: E
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Indicate whether this statement is true or false.
Earth's population is aging
Indicate whether the statement is true or false.
Why aren't air masses classified based on their pressure characteristics?
A) because sea-level pressure is fairly uniform across the globe B) because temperature is fairly uniform across the globe C) because moisture is fairly uniform across the globe D) because both temperature and moisture are fairly uniform across the globe
A feeding pattern formed when food chains overlap and interact within an ecosystem is called a food ____________________
Fill in the blank(s) with correct word