Homework answers / question archive / Question 1 0 / 1 pts What type of margins are referred to as Pacific-type margins because of their prevalence in the Pacific?    Active margin     Passive margin     Question 2 1 / 1 pts Where would you look for a continental rise?    At the base of a continental slope on a passive margin     In the middle of a deep ocean basin     On the shelf of an active margin     On either side of a mid-ocean ridge system     Question 3 1 / 1 pts What part of the continental margin is shallow, nearly flat, and is close to shore?    Continental rise     Shelf break     Continental shelf     Continental slope     Question 4 0 / 1 pts What is the composition of a continental shelf?    It is uplifted oceanic crust and is made of basalt     It is an extension of the continent, but is underlain by basaltic oceanic crust     It is an extension of the continent and is underlain by granitic continental crust     It is made entirely of sediments that have accumulated between the sea floor and the continent     Question 5 1 / 1 pts What process explains how hydrothermal vents are created?    Conduction of heat from the mantle melting rock into magma that will rise to the sea floor     The extreme pressure at depths forcing water to circulate through cracks or faults in the sea floor     Fracture zones allowing water to move from one ocean basin to the next   Convection of superheated water that escapes upward through the seafloor Question 6 1 / 1 pts A good example of a beach city located on a passive margin in the U

Question 1 0 / 1 pts What type of margins are referred to as Pacific-type margins because of their prevalence in the Pacific?    Active margin     Passive margin     Question 2 1 / 1 pts Where would you look for a continental rise?    At the base of a continental slope on a passive margin     In the middle of a deep ocean basin     On the shelf of an active margin     On either side of a mid-ocean ridge system     Question 3 1 / 1 pts What part of the continental margin is shallow, nearly flat, and is close to shore?    Continental rise     Shelf break     Continental shelf     Continental slope     Question 4 0 / 1 pts What is the composition of a continental shelf?    It is uplifted oceanic crust and is made of basalt     It is an extension of the continent, but is underlain by basaltic oceanic crust     It is an extension of the continent and is underlain by granitic continental crust     It is made entirely of sediments that have accumulated between the sea floor and the continent     Question 5 1 / 1 pts What process explains how hydrothermal vents are created?    Conduction of heat from the mantle melting rock into magma that will rise to the sea floor     The extreme pressure at depths forcing water to circulate through cracks or faults in the sea floor     Fracture zones allowing water to move from one ocean basin to the next   Convection of superheated water that escapes upward through the seafloor Question 6 1 / 1 pts A good example of a beach city located on a passive margin in the U

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Question 1

0 / 1 pts

What type of margins are referred to as Pacific-type margins because of their prevalence in the Pacific?

  

Active margin

   

Passive margin

 

 

Question 2

1 / 1 pts

Where would you look for a continental rise?

  

At the base of a continental slope on a passive margin

   

In the middle of a deep ocean basin

   

On the shelf of an active margin

   

On either side of a mid-ocean ridge system

 

 

Question 3

1 / 1 pts

What part of the continental margin is shallow, nearly flat, and is close to shore?

  

Continental rise

   

Shelf break

   

Continental shelf

   

Continental slope

 

 

Question 4

0 / 1 pts

What is the composition of a continental shelf?

  

It is uplifted oceanic crust and is made of basalt

   

It is an extension of the continent, but is underlain by basaltic oceanic crust

   

It is an extension of the continent and is underlain by granitic continental crust

   

It is made entirely of sediments that have accumulated between the sea floor and the continent

 

 

Question 5

1 / 1 pts

What process explains how hydrothermal vents are created?

  

Conduction of heat from the mantle melting rock into magma that will rise to the sea floor

   

The extreme pressure at depths forcing water to circulate through cracks or faults in the sea floor

   

Fracture zones allowing water to move from one ocean basin to the next

 

Convection of superheated water that escapes upward through the seafloor

Question 6

1 / 1 pts

A good example of a beach city located on a passive margin in the U.S. is ___________ while a good example of a beach city located on an active margin is ______________.

  

Miami, FL ... New York City, NY

   

Malibu, CA...Daytona Beach, FL

   

Indianapolis, IN...Kansas City, MO

   

Atlantic City, NJ...Santa Cruz, CA

 

 

Question 7

1 / 1 pts

What type of margin generally has a broad shelf?

  

Passive margin

   

Active margin

Question 9

0 / 1 pts

What explains the variety of life found around hydrothermal vents, since there is no sunlight there to drive photosynthesis?  

  

Minerals like sulfide are used as an energy source to build organic compounds 

   

The dim light created by black smokers is enough to drive a limited amount of photosynthesis  

   

A great deal of organic matter falls from upper zones and is used as the primary food source

   

The heated water is enough to drive the formation of organic compounds

 

 

Question 10

1 / 1 pts

What offsets the mid-Atlantic ridge’s movement at fairly regular intervals?

  

Transform faults

   

Cooling of the lithosphere

   

Seamounts

   

Hydrothermal vents

Question 11

1 / 1 pts

________ are likely to be found in subduction zones.

  

Mid-ocean ridges

   

Trenches

   

Submarine canyons

   

Abyssal hills

Question 12

What caused submarine canyons to form?

  

Sea floor spreading at a divergent plate boundary

   

Abrasive underwater landslides of sediments

   

Melting glaciers during times of lower sea level

   

Sea floor subduction at a convergent plate boundary