AnswersAZ-Earth and Space Science BOcean Circulation

Ocean Circulation Answers

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1
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How are currents in the Pacific Ocean affected by El Niño?

A
Currents travel more slowly.
B
Rip currents are frequently formed.
C
All currents become deep ocean currents.
D
Warm water moves to the east instead of to the west.
2
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Why are electrical outputs from a turbine generator highest during a spring tide?

A
A high tide comes in faster.
B
The gravitational pull of the moon is less.
C
The Sun and the moon pull in opposite directions.
D
The difference between high tide and low tide is the greatest.
3

Which best describes a tsunami?

A
large powerful wave caused by an earthquake
B
when the waves hit the shore at an angle and transport sand
C
alternating rise and fall of the ocean
D
an irregular climate event caused by ocean currents in the Pacific Ocean
4

Which phenomenon causes oceans to bulge?

A
the blowing wind
B
the Coriolis effect
C
the moon’s gravity
D
the rotation of Earth
5

Which two words identify the scientific parts of a wave?

A
breaker and crest
B
crest and trough
C
current and breaker
D
drift and current
6

Which statement explains what upwelling causes?

A
Upwelling causes tides to rise and fall.
B
Upwelling causes changes in the direction of currents.
C
Upwelling causes nutrients, minerals, and tiny organisms to rise.
D
Upwelling causes currents in the Pacific Ocean to change direction.
7

Which factor drives surface ocean currents?

A
wind energy
B
solar energy
C
pull of the moon
D
movement of turbines
8

Which source provides the energy that causes most waves to form?

A
currents
B
earthquakes
C
sunlight
D
wind
9

Which factor contributes to the formation of tides that turn turbines to create energy in the ocean?

A
wind speed
B
water density
C
Earth’s rotation
D
water temperature
10

How frequently do most coastal areas experience high tides?

A
twice a day
B
twice a month
C
four times a day
D
four times a month
11

Which event causes tides?

A
the blowing of the wind
B
the movement of warm and cool water
C
the interaction of the moon, the Sun, and Earth
D
the mixing of surface water and deep ocean water
12

Which phrase best describes surface currents?

A
up-and-down ocean movement caused by wind
B
waves that hit the shore at an angle and transport sand
C
streams of warm water flowing through the ocean and caused by wind
D
waves that approach the shore and cause their crests to fall into their troughs
13

Convection refers to the movement of heat through a fluid, such as water. Which best describes one way that convection influences the circulation of ocean water?

A
Cold water at the surface flows toward the poles and sinks as it cools.
B
Deep, warm water flows toward the equator and rises as it cools.
C
Warm water at the surface flows toward the poles and sinks as it cools.
D
Deep, cold water flows toward the equator and rises as it cools.
14

Which ocean movement do power plants use to produce usable energy?

A
currents
B
drifts
C
tides
D
tsunamis

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