Mudflow consisting of volcanic ash and water from the snow, ice, or rains is called:
a. Creep
b. Lahar
c. Slump
d. Solifluction
Answer: b. Lahar
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Sea stacks, sea caves, and headlands are examples of differential erosion. This means that
A. they are depositional landforms. B. they are produced when rocks of different strengths are eroded at different rates. C. they are produced by the action of currents on rock. D. they are produced by wave action on rock.
Which of the following countries shows high urban population concentration in more than one urban area?
What will be an ideal response?
Is the rain generally moving toward Raleigh or away?
The question is based on Figures 21-1, 21-2, 21-3, and 21-4, radar images of Raleigh, North Carolina, on November 7, 2006. The Doppler radar site in Raleigh is in the center of the image; north is to the top of each radar image. Full-color versions of these figures may be viewed on the Hess Physical Geography Laboratory Manual, 12th edition, website at www .MasteringGeography. com, then select Exercise 21, or by scanning the QR (Quick Response) code for this exercise. What will be an ideal response?
A condition that causes a system to change dramatically is a ____
a. dynamic equilibrium b. threshold c. model d. subsystem e. natural hazard