Fill This Form To Receive Instant Help
Fill This Form To Receive Instant Help
Homework answers / question archive / Question 1 1 / 1 pts Studying the fossils of shelled animals provides a "snapshot" of past ocean chemistry
Question 1
1 / 1 pts
Studying the fossils of shelled animals provides a "snapshot" of past ocean chemistry.
True
False
Video episode 12
1 / 1 pts
What do oceanographers use buoys, floats, and gliders for?
Tracking ocean circulation.
Tracking atmospheric circulation.
Predicting tectonic events.
Study migrating fishes.
1 / 1 pts
All of the following are true about the global conveyor belt EXCEPT
It distributes gases and solids around the globe.
It transports juvenile organisms.
It brings warm water to the sea surface.
It mixes nutrients.
1 / 1 pts
Which is TRUE regarding eddies?
They can trap warm or cold water and are more common along western boundary currents.
They only trap warm water and are equally common along all boundary currents.
They only trap cold water and are equally common along all boundary currents.
They can trap warm or cold water and are more common along eastern boundary currents.
1 / 1 pts
Based on what you know about the Ekman Spiral in the Northern Hemisphere, predict how a surface current will affect the deeper layer of water below it.
The deeper layer will move at an angle to the right of the overlying water.
The deeper layer will move in the same direction as the overlying water.
The deeper layer will move at an angle to the left of the overlying water.
The deeper layer will sink perpendicular to the overlying water.
1 / 1 pts
What is one of the causes of an El Niño Southern Oscillation (ENSO)?
Low pressure area shifts to the western Pacific.
Equatorial currents increase their speed.
Trade winds across the Pacific weaken or reverse direction.
Density changes in deep water circulation of the Pacific.
0 / 1 pts
Why are fisheries in the west coast of South America so heavily impacted by El Nino/ ENSO events?
The accompanying rise in sea level affects the normal fish migration patterns.
Because upwelling completely ceases in all the Pacific Basin.
The normal cold water current, rich in upwelled nutrients, is interrupted or overridden by warm water.
Low pressure systems create downwelling events rather than the normal upwelling.
1 / 1 pts
What is responsible for the long thin band of biological productivity along the equator?
Langmuir Circulation
Wind induced downwelling
Equatorial upwelling
Coastal upwelling wedged between gyres
Thermohaline circulation
1 / 1 pts
Which statement is TRUE regarding the Gulf Stream and North Atlantic Current?
They keep the east coast of the US cool and dry in the summer.
They give up all of their heat when warm water eddies are formed.
They move heat toward England, Scotland, and Ireland.
They move heat southward toward the equator.
0 / 1 pts
What keeps gyres moving in their normal patterns?
Global wind patterns
Density differences in surface water
Wave movement across the ocean surface
Global patterns of upwelling and downwelling
0 / 1 pts
What direction would a gyre in the Southern Hemisphere flow?
Right/clockwise
It varies between the Pacific and Atlantic
Left/counter-clockwise
Clockwise in the winter and counter-clockwise in the summer.
1 / 1 pts
What is the primary driving force of surface currents?
The spinning Earth
Water pressure
Density
Wind
0 / 1 pts
What is the primary force that drives thermohaline currents (thermohaline circulation)?
Pressure
The spinning Earth
Wind
Density
0 / 1 pts
Which of the following is caused by coastal upwelling?
A reduction in the amount of nutrients available in the photic zone.
A increase coastal fog and cool weather.
The slowing of water in boundary currents.
A decrease in biological productivity.
1 / 1 pts
All of the following are characteristics of western boundary currents EXCEPT
They are fast moving currents.
They move warm water poleward.
They are broad/wide currents.
They are deep currents.
