A large flood in a river may cause abrupt shifts leading to the carving of a new channel. The point at which this change occurs is a(n) ________

A) input B) threshold
C) type of dynamic equilibrium condition D) type of metastable equilibrium


B

Environmental & Atmospheric Sciences

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Pressurized fluid and chemicals injected into a well are used in a mining process called ________.

A. High pressure welling B. Heap-leach extraction C. Hydraulic fracturing D. Placer mining

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Which tree species is most widely used for the purpose of making paper?

A) maple B) cedar C) pine D) redwood E) ash

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Using the examples of Tehran and Los Angeles, discuss the special problems that vehicles create for urban outdoor air pollution

What will be an ideal response?

Environmental & Atmospheric Sciences

Which mesothermal climate type lies poleward from Mediterranean climates?

a. savanna b. marine west coast c. humid continental, mild summer d. steppe e. desert

Environmental & Atmospheric Sciences