How do sediments move along a beach? What will be an ideal response?
ANS:Answer
should include:
? The movement of sediments along the coast is called longshore drift. It is driven by
wave action, but it can also be current driven.
? Water hits beaches at an angle due to sediment accumulations. Although the water
comes up at an angle, gravity dictates that it runs straight when it returns downhill from
the shore. Sand grains disturbed by the wave will follow the water's path, moving
upward along the beach.
? This transport is longshore and runs parallel to the coast.
? Sediments are also driven by currents. They are transported in the surf zone in a
longshore current. Breaking waves distribute a portion of their energy away from the
direction of approach. This energy fuels a narrow current with suspended sediments in it.
? The net direction on both coasts of the United States is south due to the direction waves
normally approaching from the north.
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The part of geography that embodies map making is known as
A) calligraphy. B) theodesy. C) cartography. D) printmaking. E) geodesy.
The famous destruction of the Roman city of Pompeii was produced by ________
A) a large cinder cone burying the city in tephra B) a pyroclastic eruption from a composite volcano that buried the city in ash and smothered the people living there C) a volcanic mudflow from Mt. Vesuvius that buried the people and the city D) a composite volcano erupted lava that buried the city, fossilizing people who were overridden by the fast moving flows
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Answer the following statement true (T) or false (F)