Which of the following best describes the ocean surface
A. zone of calm, slow-moving water
zone of turbulent mixing
zone of very dense, cool water
zone of low-salinity, dense water
Which statement best describes the difference between ocean
surface currents and deep ocean currents?
A. Surface currents are cooler than deep currents
because of the influence of wind.
Surface currents are driven by wind; deep
currents are driven by density differences.
Surface currents are slow-moving; deep currents
Surface currents are denser than deep currents.
Flat areas that
occupy the deepest parts of the ocean floor are called the
Where does most of the deep ocean water come from?
A. sinks from the North Atlantic
B. input from rivers and streams on the
C. upwelling from the Indian and
D. melting of polar ice sheets
What effect might
the introduction of more freshwater into the North Atlantic have on global
speed it up
stop it completely
block it and slow it down
make it flow in the opposite direction
during El Nino years when coastal upwelling off the coast of South America is
A. plankton populations flourish and fishing is
plankton populations stay fixed but fish
populations boom, creating imbalance in the ecosystem
plankton populations die off and fishers are put
out of work
From which of the
following do clouds form?
moisture evaporated from Earth
moisture from winds
water droplets from the upper atmosphere
As the Gulf Stream
travels north, it cools the air above it, making the climate of England cooler
than it would be without the Gulf Stream.
Tundra is found in
which climate zone?
Which of the
following often takes place during El Nino?
drought in the western Pacific
high rainfall in the western Pacific
strengthening of trade winds in the south
mountains can block the passage of moist air, making one side of the mountain
receive more rain than the other.
Which layer of the atmosphere is
very thick and is characterized by charged particles called ions?
In air the elements lead, cadmium,
mercury and copper are examples of