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Exam 18: Restless Realm: Oceans and Coasts

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Question 21

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Scientists believe that approximately 60 million years ago the closing of the Isthmus of Panama changed the climate of Earth so severely that winters in Europe became 10°C warmer than they had been.Why did this happen?

A) Cold Caribbean Sea waters were forced up into the north Atlantic Ocean.
B) Warm Caribbean Sea waters were forced up into the north Atlantic Ocean.
C) The ice in the Caribbean Sea was broken apart by plate movements.
D) A mountain range formed that blocked the movement of cold air into the area.

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Question 22

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Along beaches,groins have ________.

A) solved the problem of beach drift
B) increased erosion rates immediately up current from the groin
C) increased erosion rates immediately down current from the groin
D) increased depositional rates immediately down current from the groin

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Question 23

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Rip currents ________ the shoreline.

If the wind is blowing parallel to a coast,will it create an upwelling current or downwelling current?

If a dam is installed across a river,what effect will this have on the coastline?

Using the figure below,which of the following lists correctly identifies the various seafloor landforms?

A wave will disturb the water to a depth equal to ________.

The form and topography (depth profile) of the ocean floor is termed ________.

If sea level continues to rise and covers the city of Miami,the Florida coast will become a(n) ________.

Which type of coastline would most likely contain estuaries or fjords?

How would the Coriolis affect the space station?

Barrier islands are constantly moving in the direction of ________.

The density of seawater increases with ________ temperature and ________ salinity.

You are a coastal geologist trying to help a coastal community restore its sediment-starved beach.You decide that beach nourishment is the best option,so you order that dredge sediment from the nearest river be placed on the beach.The sediment is 70% silt and 30% sand.What will be the effect of using this sediment?

Thermohaline circulation carries ________ water from the poles to the equator,where the water becomes ________.

Which of the following figures shows a coast experiencing high tide?

The U-shaped valleys in Kenai Fjords National Park in Alaska were created during a(n) ________.

The deepest segments of the ocean floor are found ________.

In the figure below,which letters represent the crest and trough?

The sea surface salinity is ________ at the mouth of the Amazon River and ________ in the Dead Sea.