Chapter 18
Which of the following are structures or ways in which coastal communities try to slow or reverse beach erosion? B. beach nourishment D. groins E. seawalls F. breakwaters
A. raised supports for buildings B. beach nourishment C. artificial reefs D. groins E. seawalls F. breakwaters
What do the colors on the map represent? Choose one: A. water-flow velocity B. water temperature C. water salinity D. water depth
A. water-flow velocity
Which of the following are true regarding seawalls? -Seawalls are cheap and easy to build. -Seawalls protect beach cliffs from erosion. -Seawalls reflect wave energy. -Seawalls can increase the rate of beach erosion.
Seawalls reflect wave energy. Seawalls can increase the rate of beach erosion.
The difference between passive and active continental margins is that passive margins lack
Seismicity
Why can't the docks and gangways be fixed in position?
The docks and gangways need to be able to move as the tide comes in and out.
Which of the following can lead to the formation of an ocean dead zone? Choose one or more: ocean upwelling loss of nutrients in the water phytoplankton blooms overfishing increased salinity
ocean upwelling phytoplankton blooms
Which line represents the high-tide level in this photo?
red line
An organic coast is a coast __________
where living organisms control landforms along the shore
Identify the features of this coastlines
A. Wave-cut platform B. Sea arch C. Sea stack D. Wave-cut notch E. Headland
Does the map below show an active or passive margin
Passive
Order the steps in the formation of ocean waves from first to last.
1. Wind begins to blow 2. Frictional drag on surface of water 3. Ripples form 4. Waves form
Label the landforms along the sedimentary coast in the diagram below
A. Barrier island B. Badmouth bar C. Bay D. Estuary E. Longshore current F. Longshore drift G. Sand spit
What is the flow direction of the Gulf Stream? Choose one: A. It flows from the North Atlantic to southern Florida. B. It flows from southern Florida into the North Atlantic. C. It flows west to east across the Atlantic Ocean.
B. It flows from southern Florida into the North Atlantic.
What are the small, circular currents on the map called? Choose one: A. atolls B. eddies C. gyres D. whirlpools
B. eddies
Which type of organic coast is shown in the photo below
Coral reef
Does the diagram below show an emergent or submergent coast?
Emergent
A wetland dominated by grasses, like in the photo below, is called a __________
Marsh
An estuary is __________
a river valley flooded by a relative rise in sea level