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Exam 15: The Dynamic Ocean

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Question 31

Multiple Choice

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Which one of the following structures is built to protect boats from large breaking waves?

A) jetty
B) seawall
C) groin
D) breakwater

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Question 32

Multiple Choice

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Construction of a breakwater produces the same effect as what kind of natural coastal structure?

A) an island offshore breaking waves and trapping sand behind to form a tombolo
B) a spit, formed by sand moving by longshore drift accumulating along the opening of a tidal channel
C) a sea cliff producing erosion at the base of the sea cliff i.e. breakwater.
D) a barrier island, which forms an artificial beach at the front of the breakwater

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Question 33

Multiple Choice

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A north south oriented shoreline has land to the east and the major storm waves arrive from the southwest. A headland abuts westward along the shoreline and exposes a distinctive black basalt that is rapidly eroded by waves pounding the coast. Where would you expect to find black sand derived from this headland?

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

The height, length, and period of a wave depend upon _______ .

_______ are offshore manmade rock barriers that run parallel to the beach .

When the daily tidal range is least, it is called a_______ tide.

When sea ice forms in high latitudes, the sea ice has _______ .

When waves crash against a sea cliff, what is the main process that erodes the cliff?

The zigzag movement of sand grains along a beach is_______ .

Fetch is_______ .

A sandbar that completely crosses a bay, sealing it off from the open ocean, is a_______ .

The movement of sand parallel to the shore_______ .

The Coriolis effect causes ocean currents in the Southern Hemisphere to be deflected_______ of their path of motion.

El Niño is a well- known weather phenomenon. In Ecuador and Peru, fisherman knew about the phenomena long before it was well known because their fishing would be very poor during El Niño conditions. Normally Peru and Ecuador have a remarkable fishery because there is a prominent upwelling along the coast producing planktonic blooms that feed the entire ecosystem. This upwelling is driven by surface wind conditions. From your knowledge of currents and wind conditions, which of the following happens during El Niño conditions in this area?

You have a beach house on the east coast of Florida. The main wave source is to the northeast. Your neighbor to the north of you is having problems with beach erosion and storm waves often come under his house. So he decides to build a groin and he tells you it is for the benefit of the neighborhood. What should you respond to his comment?

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

You are interested in buying a piece of land overlooking the sea. You find a place atop a 50m high sea cliff. The lot is only about 30m wide but is 200m long parallel to the coast, so you think you are getting a large expanse of the coastline. What would be the most important thing to look for in considering this purchase?