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