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Homework answers / question archive / Question 1 1 / 1 pts Much of the Atlantic coast is subject to coastal sinking and sea level rise, which has formed huge flooded valleys

Question 1 1 / 1 pts Much of the Atlantic coast is subject to coastal sinking and sea level rise, which has formed huge flooded valleys

Biology

Question 1

1 / 1 pts

Much of the Atlantic coast is subject to coastal sinking and sea level rise, which has formed huge flooded valleys. 

  

True

   

False

 

 

Question 2

1 / 1 pts

Why is it dangerous to commercially develop a barrier island?

  

They are usually found on active margins and are associated with a lot of tectonic activity. 

   

They have been know to completely sink into the underlying crust. 

   

They migrate as sea level changes and storms can generate waves severe enough to erode them. 

   

Their relative isolation from the mainland (1000 + miles) makes it difficult for rescue workers to help if the need arises. 

 

 

Question 3

1 / 1 pts

What kind of coral reef is separated from land by a lagoon?

  

Barrier reef

   

Atoll

   

Fringing reef

 

 

Question 4

1 / 1 pts

What is the term used to describe the accumulation of sediment (sand) that runs parallel to shore and marks the normal limit of sand deposition by wave action?

  

Berm

   

Longshore trough

   

Backshore

   

Scarp

 

 

Question 5

1 / 1 pts

Sandy beaches dominate which type of coast?

  

Depositional

   

Central California coast

   

New, high-energy coasts

   

Erosional

 

 

Question 6

0 / 1 pts

Which is true regarding erosional coasts?

  

Make up only about 30% of US coastlines and are usually rocky. 

   

Make up about 30% of US coastlines and are usually sandy. 

   

Make up about about 70%of US coastlines and are usually rocky. 

   

Make up about 70% of US coastlines and are usually sandy. 

 

 

Question 7

1 / 1 pts

What is the relationship between grain size and beach slope?

  

Coarse-grain beaches tend to have a gradual slope. 

  

Fine-grain beaches tend to have a steep slope. 

 

Fine-grain beaches tend to have a gradual slope. 

 

 

Question 8

1 / 1 pts

How does wave energy affect headlands and bays?

  

Wave energy is focused on to bays and away from headlands. 

   

Wave energy is focused on to headlands  and away from bays. 

   

Wave energy is equally distributed between headlands and bays. 

 

 

Question 9

0 / 1 pts

What affect does the longshore current have on coasts?

  

Generates winds that blow offshore and initiate coastal upwelling. 

   

Pulls sediment like sand away from the coastline and out to deeper waters. 

   

Moves sediment (sand) along the coast.

   

Deposits sediment (sand) high on the foreshore to create berms and dunes. 

 

 

Question 10

1 / 1 pts

What causes the longshore drift of sediment particles along the beach?

  

Low pressure system causing winds to blow parallel to shore. 

   

Waves approaching the shoreline and breaking at a slight angle. 

   

The rise and fall of tides throughout a 24-hour period. 

   

Waves refracting off of sand bars and breaking perfectly parallel to the beach. 

 

 

Question 11

1 / 1 pts

The Pacific coast is on a passive margin while the Atlantic coast is on an active margin. 

  

True

   

False

 

 

Question 12

1 / 1 pts

What is the correct sequence of reef formation?

  

Atoll, island with a fringing reef, island with a barrier reef

   

Island with a barrier reef, island with a fringing reef, atoll

   

Island with fringing reef, island with a barrier reef, atoll

   

Island with a fringing reef, atoll, island with a barrier reef

 

 

Question 13

1 / 1 pts

Sea cliffs and sea caves are associated with

  

Erosional coasts

   

Depositional coasts

 

 

Question 14

1 / 1 pts

Irregular shorelines with headlands and bays will eventually be smoothed and straightened by coastal erosion. 

  

True

   

False

 

 

Question 15

1 / 1 pts

What affect do seasons have on some sandy beaches?

  

Sand can accumulate on the beach due to winter storms. 

   

Sand can be removed during the winter due to winter storms. 

   

Sand can be removed during the summer due to the calm summer surf. 

 

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