14A
A lower-than-usual tide that occurs when the sun, moon, and earth form a right angle is called a(n)
NEAP TIDE
Winds are associated with:
A. surface currents
B. upwelling
C. downwelling
D. density current
A. surface currents
The vertical distance between the crest and trough of a wave is called the ___________________.
Wave height
Which of the following are produced primarily by gravity?
A. waves
B. currents
C. gyres
D. tides
D. tides
What is the name of the solar tide where the sun, moon and earth form a right angle?
neap tide
Daily or twice-daily changes in local sea level due to the moon’s gravity are
LUNAR TIDES
A gyre is associated with:
A. surface currents
B. upwelling
C. downwelling
D. density current
A. surface currents
The distance from one crest to another crest of a wave is called the ____________________
wave length
What usually has the greatest influence in causing tides?
A. the earth’s core
B. the moon
C. the sun
D. the weather
B. the moon
What phases of the moon occur during a spring tide?
new and full
A higher-than-usual tide that occurs at new moon or full moon is called a(n)
SPRING TIDE
What type of current is a thermohaline current?
A. surface current
B. upwelling
C. downwelling
D. density current
D. density current
The distance that wind blows over the water’s surface in one direction as waves form is the ______________ of the waves.
fetch
Which of the following is the best explanation for tides?
A. Winds push water to one side of the ocean basins.
B. The tidal bulge moves around the earth, causing high and low tides.
C. Upwelling and downwelling create high and low tides.
D. The earth moves under the tidal bulge to form high and low tides
D. The earth moves under the tidal bulge to form high and low tides
(true or false) Ocean currents can affect the climate of large areas of the world.
True
High tides happen when a spot on Earth rotates through a tidal
BULGE
Carries nutrients from deep water to the surface
A. surface currents
B. upwelling
C. downwelling
D. density current
B. upwelling
Currents that flow parallel to the shore are called _________________ currents
longshore
How many tides do most coasts experience in a typical twenty-four-hour period?
A. one low and one high
B. two lows and one high
C. one low and two highs
D. two lows and two highs
D. two lows and two highs
Which of the following is not an advantage of tidal power generation?
A. Tides are driven by gravity, so tidal power generation is inexhaustible.
B. Tides occur regularly due to astronomical influences, so tidal power generation is reliable.
C. Tidal dams must be designed to allow boats and ships to pass.
D. Tidal generation facilities do not produce any kind of waste products, so they are nonpolluting.
C. Tidal dams must be designed to allow boats and ships to pass.
(true or false) Read carefully. Look at page 335
It is possible for a body of water to have only a single high and low tide each day.
TRUE
(True or False) Surface ocean currents are deflected by the Ekman spiral.
False
Narrow, fast currents that flow offshore through gaps in offshore bars are called ______________ currents
rip
Which of the following combines the influences of the Coriolis effect, current
speed, and water depth to change the direction of a current?
A. coastal downwelling
B. density currents
C. the Ekman spiral
D. oscillation
C. the Ekman spiral
The Great Pacific Garbage Patch is the result of man’s carelessness and a strong oceanic ______.
gyre