In an atom, the nucleus is composed of _____________ and _____________, and the ____________ orbit very quickly around the nucleus.
protons; neutrons; electrons
What accounts for all the unique properties of water?
Its unique geometry causes the water molecule to have a resulting electrical polarity.
Each hydrogen atom shares its single electron with electrons in the oxygen atom. Which type of bond is this?
The fact that ice is less dense than water—which causes ice to float—is due to
the molecular packing of bulky ice crystals
The Red Sea has ____________ water because of large amounts of ______________.
Where is the salinity of ocean surface waters HIGHEST?
about 25 degrees north or south of the equator
There is no pycnocline in _______ latitude regions because _____________.
high-; the water column is uniformly cold and dense
In water vapor, there is no interconnectedness of individual water molecules (no hydrogen bonds).
Latent heat can be absorbed or released only as water undergoes the process of changing state (e.g., as water changes from a liquid to a solid).
The density of seawater increases with ________ in temperature and ________ in salinity.
a decrease; an increase
The process of purifying seawater by removing most of its dissolved substances is called ___________.
The "midnight Sun" is a phenomenon observed in Northern Hemisphere polar regions only when the Sun is directly above _______________.
the Tropic of Cancer
Globally, air descends (sinks toward the surface) at ______________.
30 degrees latitude and 90 degrees latitude (the poles)
Areas of high atmospheric pressure (at Earth's surface) generally experience what kind of conditions?
sinking air, with dry, clear weather
Legend holds that the "horse latitudes" derived their name from sailors who, in desperation, abandoned horses overboard because the sailors were
stuck at the boundary between the trades and the westerlies.
Rising warm air is associated with regions of ________ atmospheric pressure caused by thermal ________.
Which of the following statements about the Coriolis effect is FALSE?
The Coriolis effect tends to increase or decrease the speed of moving objects.
Air typically moves from regions of high atmospheric pressure toward regions of low atmospheric pressure.
The major wind belts of the world are generated by the lowermost portion of Earth's atmospheric circulation cells.
Hurricanes are associated with __________ atmospheric pressure and spin ______________ in the Northern Hemisphere.
Sea ice forms by seawater freezing; icebergs form _____________.
when glacial ice on land falls off into the ocean
For an equal quantity of solar radiation hitting all parts of Earth, the "solar footprint" is larger at the equator than it is in high latitudes.
Going from the equator to the North Pole, what are the names of the wind belts you would cross?
the trade winds, the prevailing westerlies, the polar easterlies
Surface ocean currents are caused by ______________, whereas deep currents are the result of ________________.
surface wind belts; density differences
In relation to ocean circulation, a gyre is ________________.
a large, circular-moving loop of surface water
A geostrophic current is one that (ideally) flows _______________.
in a circular path around the central "hill" of a gyre
Ekman transport is an average path of motion that, under ideal conditions, is at ______________ to the wind's direction.
Western intensification is _______________.
caused by the rotational center of a gyre being located to the west of the ocean basin's geographic center, thus causing more water to flow within a narrower "channel."
In subtropical gyres, western boundary currents have all of the following characteristics EXCEPT _______________.
they are relatively wide
What is one of the first indications that an El Niño event may be occurring?
Warm water from near Australia migrates toward South America.
Which of the following statements about El Niño events is FALSE?
Fishing along Peru and Ecuador is much better.
The atmospheric circulation cell in the equatorial South Pacific created by the movement of air between high- and low-pressure regions is called the
The ocean's deep water is initially formed at the ____________ and in __________ regions.
Subtropical gyres flow counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
The East Australian Current is the western boundary current of the South Pacific subtropical gyre.
Which of the following is an example of a western boundary current of a subtropical gyre?
the Kuroshio Current
Which of the following currents does NOT belong with the others as part of the same gyre?
the Agulhas Current
Which of the following statements about the physical characteristics of waves is FALSE?
The depth at which orbital motion ceases is called the still water level.
Circular orbital motion in waves becomes negligible (dies out) at depths greater than ____________.
half the wave's wavelength
In deep water, a wave with a wavelength of 60 meters and a wave height of 6 meters will have orbital motion down to a depth of ___________.
Which of the following is NOT a physical change that a wave experiences as the wave reaches shallow water?
The wavelength increases.
Which of the following statements about orthogonals is FALSE?
Orthogonals are the same thing as the wave crests.
Of the following factors, all increase the amount of energy in waves EXCEPT ____________.
increasing water vapor content in the air
In shallow-water waves, wave speed increases with increased water depth; in deep-water waves, wave speed increases with increased wavelength.
Internal waves can sometimes exceed heights of 100 meters (330 feet) and can carry submerged objects to great depths.
The superposition, or overlapping, of two waves always results in destructive interference between the different waves.
When a tsunami reaches a coastal area, it is always represented by a single rapid surge of water toward the shore, resembling a suddenly occurring high tide (which is why they are misnamed "tidal waves").
Which of the following statements about the movement of waves in a wave train is FALSE?
Waves pick up speed as they move out of the "sea" area where they are generated.