Quiz 6a: Oceans Coastal Processes and Landforms
Coast, backshore, foreshore, nearshore
From inland to the ocean, which sequence of zones is correct?
beach drift
Particles of sand, gravels, and shells that move along the shore form the:
Greater; refraction concentrates energy into the headland
The energy of waves striking a headland that protrudes into the sea is ________ than that which strikes the beaches adjacent to it because ________ .
its wavelength shortens
The height of a tsunami grows as it approaches a coastline primarily because:
true
The salinity of seawater averages 3.5 percent, or 35 parts per thousand.
true
barrier islands can migrate
in a deltaic swamp
brackish water would most likely occur:
High evapotranspiration rates
brine water results from
littoral zone
A general term for the coastal environment is:
waves of transition
A longshore current involves all of the following except:
true
A single groin can produce both sand erosion and deposition.
cliff
A wave-cut platform is the erosional remnant of a:
Mixing zone where solutes and temperatures blend quickly
About 2 percent of the oceanic mass is made of the:
false
Although many elements are dissolved in seawater, no gases are dissolved in it.
tsunami
An earthquake, a submarine landslide, or an eruption of an undersea volcano is capable of producing a:
waves of translation
As a wave approaches the shoreline and enters shallower water, energy and water move forward causing the water to rise and cascade down from the wave crest as a breaker. These waves are called:
true
Determining mean sea level requires measurement of tidal levels hourly for at least a period of several years.
wave refraction
Wave action works to straighten a coast as wave energy focuses around headlands and tends to disperse energy in coves and bays in a process called:
Longshore currents
When people go swimming along a coast, they often find themselves, after a while, down the coast from where they first entered the water. They moved downshore because of:
line, largest
When the Sun, Earth and Moon are in conjunction, the arrangement of these three celestial bodies forms a ________and it results in the ________tidal range.
Salinity varies all over the world, but the ratio of individual salts to each other does not change
Which of the following is correct regarding the chemical content of Earth's oceans?
It was about 130m (430ft) lower 18,000 years ago, and about 10-20cm lower ~100 years ago.
Which of the following is correct regarding worldwide sea level?
bay barrier
Which of the following is not an example of a depositional coastal landform?
Tidal bulges rotate with Earth; i.e., they move with the landmasses as Earth rotates
Which of the following is not correct regarding tides?
barrier islands
Which of the following would not be found along a tectonically active shoreline?
