Currents – Flashcards
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The Gulf Stream is an example of a(n) ____________ current.
a.
surface
c.
deep
b.
Coriolis effect
d.
Antarctic
answer
A. Surface
question
Temperature, salinity, and density are factors in the formation of
wind currents.
electric currents.
deep currents.
surface currents.
answer
Deep currents
question
What are the two causes of density in deep current waters?
a.
Salinity (how much salt) of the water and high temperatures
c.
Oxygen content of the water and high temperatures .
b.
Salinity (how much salt) of the water and low temperatures
d.
Oxygen content of the water and low temperatures
answer
B. Salinity (how much salt) of the water and low temperatures
question
The curved paths of global winds and surface currents are caused by
a.
the revolution of the Earth.
c.
warm air near the equator.
b.
the Coriolis effect.
d.
continental deflection.
answer
B. The Coriolis effect
question
Which currents carry warm water away from the equator?
a.
deep currents
c.
surface currents
b.
evaporation
d.
freezing
answer
C. surface currents
question
Which of these events happens first in Earth's polar regions?
a.
The dense water sinks.
c.
Water molecules move closer together.
b.
The water travels as a deep current.
d.
Cold air chills water molecules.
answer
D. Cold air chills water molecules
question
In 1947 Thor Heyerdahl sailed a simple raft from Peru to Polynesia, following the ocean currents for more than 6,000 kilometers. Which statement accurately describes what Heyerdahl proved by this voyage?
a.
Ancient Peru was settled by people from Polynesia.
b.
People from ancient Peru were the first settlers of Polynesia.
c.
It would have been possible for people from ancient Peru to reach Polynesia by following ocean currents.
d.
Polynesia was settled accidentally when rafts from Peru were carried out by ocean currents.
answer
C. It would have been possible for people from ancient Peru to reach Polynesia by following ocean currents.
question
Ocean currents flow from east to west near the
a.
Gulf Stream.
c.
equator.
b.
poles.
d.
global winds.
answer
C. Equator
question
How does the Coriolis effect make ocean currents appear to move?
a.
back and forth
c.
clockwise
b.
in a curved path
d.
against the Earth's rotation
answer
B. In a curved path
question
The Gulf Stream Current is deflected by North America, causing the current to change direction. What is this concept called?
a.
Continental deflection
c.
Pycnocline
b.
The Coriolis effect
d.
Conveyor belt cycling
answer
A. Continental Deflection
