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WorksheetsOcean Currents Review
Total questions: 55
Worksheet time: 38mins
The Gulf stream (starting near the Equator) carries _____________ water from the east coast of The United States to the West coast of Europe.
Cold
Warm
Fresh
The apparent curving of moving objects from a straight path due to Earth's rotation is called the _____________ _________.
Coriolis effect
Ekman spiral
Winds
Thernohaline circulation
Surface winds cause surface currents by
the Coriolis effect
transferring wind energy to ocean water
wind absorbing energy from ocean water
gravity
Surface currents north of the equator flow clockwise, but surface currents south of the equator flow counterclockwise due to the Coriolis effect.
True
False
A huge circular pattern of rotating ocean currents.
whirlpool
cyclone
hurricane
gyre
The observation that moving ocean currents move at an angle from its wind source and continues to deflect as depth increases is called ...
The Ekman spiral
Thermohaline Circulation
Eddy
Coriolus effect
In temperate regions (like in FL), the ocean surface water is heated by the sun, causing some water molecules to evaporate. How would you expect this to affect the concentration of salt molecules?
Increased concentration of salt
Decreased concentration of salt
No change in salt concentrations
None of the above
In temperate regions (like in FL), the concentration of salt ions is highest ...
Deep in the water column
Near the surface of the water
In the middle of the water column
None of the above
In polar regions, the concentration of H2O (water) molecules is highest _____________.
Deep in the water column
Near the surface of the water
In the middle of the water column
None of the above
Upwelling currents bring water to the surface that is ..... (You must choose the TWO correct answers)
warm
cold
rich in nutrients
rich in oxygen
Which current shown on the globe is the Gulf Stream?
Current A
Current B
Current C
Current D
Which of these is considered an equatorial current, driven by tradewinds?
Current A
Current B
Current C
Current D
What causes the downwelling in the Northern Atlantic Ocean?
strong winds from the Arctic Ocean
salty water becoming very cold and dense in the Northern Atlantic
extra strong tradewinds
the delivery of warm water by the Gulf Stream
The Ocean Conveyor Belt is also called thermohaline circulation because it is driven by
winds
Coriolis Effect
differences in temperature and density
Downwelling delivers water from the surface to the deep that is rich in ____________.
fish
nutrients
oxygen
There is more cloud formation and rainfall over _______________.
cold water
warm water
Which of the following is true?
Currents traveling from the equator carry a lot of heat energy towards the poles.
Currents traveling from the equator carry a lot of nutrients towards the poles.
Currents traveling from the equator carry a lot of oxygen towards the poles.
The equatorial currents can be found
in only the northern hemisphere
in only the southern hemisphere
in both hemispheres
If coral reefs need warm water, on which coast of Australia would you expect to find the Great Barrier Reef, based on this map of ocean gyres?
the east coast
the west coast
Along which coast would you expect a drier climate?
The east coast of South America
The west coast of South America
When would you expect seabirds along the coast of Ecuador/Peru/Galapagos to have mass die-offs due to a lack of food (fish)?
during a normal year
during an El Nino year
during a La Nina year
During an El Nino year, the tradewinds
are weaker
are stronger
don't change
Which shows a year that California and Mexico might experience a little relief from their typical drought like conditions?
Map A
Map B
Which shows a normal year in the Pacific Ocean?
Map A
Map B
There are 5 large gyres in the worlds oceans. Which is NOT one of the major gyres?
North Indian
South Indian
North Pacific
South Pacific
North Atlantic
The California Current (west coast) carries _________ water from Canada.
Cold
Warm
Fresh
Which type of water is MOST dense?
cold
warm
Which type of water is MOST dense?
fresh
salt
Which processes decrease salinity?
freezing
melting sea ice
precipitation
surface run off from land
evaporation
Identify the process(es) that REMOVE fresh water from the ocean.
melting ice bergs
evaporation
freezing
precipitation
surface run off from land
Which processes increase salinity?
evaporation
surface run off from land
precipitation
freezing
melting
two ice cubes were melted in a tray of fresh water. Why did the two cubes form layers?
they were the same density
they had different colors of dye
they had different amounts of salt
they were frozen for different lengths of time
What term is used to describe the rapid change in temperature with depth?
thermohaline circulation
thermocline
thermopolis
temperature sink
Compared to other regions at the same latitude, western Europe has a relatively warm climate. Explain.
W. Europe sits on a thermoclime
W. Europe is at a lower elevation than other countries
W. Europe is heated by a current
W. Europe is heated by nuclear power plants
______ causes deep ocean currents
The Coriolis Effect
gravity
wind
density differences
Glaciers melting leads to higher salinity.
True
False
The surface
The middle
The bottom
When surface currents meet continents they ___?
Stop moving
Are deflected (change paths)
Continue in the direction they were going
When a large surface current has lost a lot of heat due to evaporation, it becomes more cool, ______&_____, so it sinks.
less salty & more dense
less salty & less dense
more salty & less dense
more salty and more dense
________ and _______ affect the ocean's density and cause the Global Conveyor Belt to travel
gravity and the Coriolis Effect
temperature and salinity
wind and climate
temperature and the Coriolis Effect
Based on the graph, which of the following statement(s) is(are) correct?
Warm water sinks to the bottom of the ocean
Warm water flows on the surface of the ocean
Cold water flows in the deepest part of the ocean
Cold water remains stationary in the deepest part of the ocean
Along which coast would you expect the ocean to be high in nutrients, oxygen, and biodiversity?
The east coast of South Africa
The west coast of South Africa
Along which coast would you expect the ocean to be low in nutrients, oxygen, and biodiversity?
The east coast of North America
The west coast of North America
Which of the following is this image?
El Nino Southern Oscillation
La Nina
Which of the following is this image?
El Nino Southern Oscillation
La Nina
During El Nino, the high pressure system is over ____.
Australia
South America
The ocean
During La Nina, the high pressure system is over ____.
Australia
South America
The ocean
Trade winds blow east to west (Easterly) across the Pacific.
When this is stronger, we have a La Nina event.
When this is weaker, we have a La Nina event.
When this is stronger, we have an El Nino event.
When this is weaker, we have an El Nino event.
Fisheries in South America:
La Nina = booming due to greater deep water nutrient upwelling.
La Nina = suppressed due to lower deep water nutrient upwelling.
El Nino = booming due to greater deep water nutrient upwelling.
El Nino = suppressed due to lower deep water nutrient upwelling.
