Deck 16: Coastal Processes and Hazards

Question 1

The law of gravity states that two bodies attract each other with a force directly proportional to the product of their masses and inversely proportional to the _____ of the distance between them.

A)first power
B)square
C)cube
D)square root
E)log

Answer 1

B

Question 2

Newtons Law states that force is proportional to

A)Mass times velocity
B)Mass times acceleration
C)Mass squared
D)Mass times speed of light squared

Answer 2

B

Question 3

Groins are:

A)wave enhancers
B)wave diffraction inhibitors
C)small,boulder/rubble deposits
D)short,elongated mass,parallel to the shore
E)short,elongated mass,perpendicular to the shore

Answer 3

A

Question 4

When waves hit headlands they

A)dissipate and lose energy
B)shallow and deepen simultaneously
C)fan out,becoming less dense
D)refract,focussing energy
E)contract,releasing tidal energy

Question 5

Longshore drift:

A)acts like an offshore river
B)is reduced by beach construction
C)is enhanced by beach restoration
D)is too far off shore to be a concern
E)does not exist in cliffy regions

Question 6

Newton showed that differential tidal forces are inversely proportional to the ________ of the distance between them.

A)first power
B)square
C)cube
D)square root
E)logarithm

Question 7

Severe coastal erosion

A)is reduced by sea wall construction
B)is accelerated by sea wall construction
C)is highest inbound of tidal flats
D)is eliminated when protection is introduced

Question 8

Why is there more coastal damage if the sand dunes are lower? Which of the following is least important?

A)There is more erosion because wave energy is not used in moving the dune sand.
B)Waves can go over the dunes to strike the homes
C)Waves can carry sand inland as overwash
D)The surge can move much farther inland
E)The wind is stronger near the ground in low-dune areas

Question 9

The sun and the moon each exert a tidal force.These are highest:

A)at the winter apogee
B)once a week
C)twice a month
D)during the summer solstice
E)during the winter solstice

Question 10

When waves reach shallow water their velocity is controlled by:

A)water fluidity
B)water salinity
C)water volatiles
D)water depth
E)water chemistry

Question 11

As a wave approaches man made obstructions along the coast at an angle:

A)Sand is deposited on the near side and eroded in the wake
B)Sand is deposited on the wake side and eroded on the near
C)Sand remains constant
D)The beach is in equilibrium
E)The beach is in a state of negative feedback