Unit 4 Flashcards
The _____ is the largest ocean.
Pacific
The distance between two matching points on a wave is the _________.
wavelength
The periodic and predictable rise and fall of water is a _______.
tide
75% of the ocean’s floor is found in the ________ zone.
abyssopelagic
The layer of water that has a sharp decrease in temperature and forms a barrier between the warm surface water and the cold deeper water is the _________.
thermocline
________ tides consist of two high and two low tides per day of unequal proportion.
mixed
currents caused by waves breaking at an angle along the shore are _______ currents.
longshore
the ____ is defined as a body of saltwater that covers 70% of the earth’s surface.
ocean
the _______ of earth’s plates is called plate tectonics.
movement
________ currents are caused when surface water is blown away by the wind and deeper water rises to replace it.
upwelling
______ are spiral ocean currents caused by global wind patterns.
gyres
________ is the process at convergent plate boundaries where the old crust disappears into trenches as new crust is formed.
subduction
crust is destroyed at ________ boundaries.
convergent
large waves that are caused by earthquakes or disturbances on the ocean floor are called _______.
tsunami
______ means of or relating to the shore
littoral
The _______ ocean has currents that change direction twice a year.
Indian
The highest point of a wave is the ______.
crest
_________ tides consist of two high tides and two low tides of equal strength.
semidiurnal
longshore currents cause the formation of ________ islands.
barrier
the gradual movement of continents over time is _______________.
continental drift
the term __________ describes the movement of the ocean.
water current
part of an ocean that is partially encircled by land is a ______.
sea
the continents are thought to have been all part of a supercontinent called ________.
pangea
most waves are caused by the _______.
wind
