Chapter 8 test
The ultimate source of most of the energy for ocean currents is
The sun
A system of four currents completing a flow circuit around the periphery of an ocean basin is collectively called:
a gyre
A monsoon is
a local seasonal weather patter that causes winters to be very dry
The sun heats the Earth unevenly because
all of these
Scientists use all of the following methods/equipment to study ocean currents EXCEPT
none of these
The layer of the atmosphere next to the ground is the ___. The layer that extends into space is the ____.
none of these
___ can result when an air mass rapidly cools, causing water vapor to condense
rain or snow
Countercurrents and undercurrents generally move ___ than the surface current above, and in ____ direction.
slower; the opposite
The Coriolis effect is caused by
the rotation of the earth
Upwelling areas are
two of these
Convection is caused by
warm air rising and cool air flowing in to replace it
Generally the fastest and deepest currents are
wetern boundary currents
The immediate source of surface currents is
wind
Cyclones form where
wind gets drawn into a low pressure area at the Earth's surface, forming a spiral pattern
The earth's rotation influences currents by a "force" known as
Coriolis effect
About ____% of the sunlight that reaches the atmosphere makes it to the Earth's surface
50
Air is about ____% nitrogen
78
Currents tend to move in large ____ patterns in the northern hemisphere
clockwise
The densest water in ocean currents is the
coldest and saltiest
As the amount of water vapor in air increases, the air's density
decreases