Answers2026-27 AL-Earth and Space SciencePlate Tectonics

Ocean Circulation Answers

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1
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Which source provides the energy that causes most waves to form?

A
currents
B
earthquakes
C
sunlight
D
wind
2
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Which factor drives surface ocean currents?

A
wind energy
B
solar energy
C
pull of the moon
D
movement of turbines
3

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.
4

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
5

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
6

Ocean circulation is the large-scale movement of water in the ocean. It involves the transport of heat through convection, which is the movement of heat through liquids and gases.Which statement describes how convection moves heat in the ocean during non-El Niño (normal) years?

A
Convection moves heat toward the west.
B
Convection moves heat toward the east.
C
Convection moves heat toward the north.
D
Convection moves heat toward the south.
7

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
8

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.
9

When will the waves at the shore be the smallest and calmest?

A
when the tide is receding
B
when upwelling occurs
C
when the wind is not blowing
D
when the tide is coming in
10

Which phenomenon causes oceans to bulge?

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

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