Seafloor Features, Hydrothermal Vents and Coral Reefs Review

What type of continental margin is found at the Atlantic coast, has wide and shallow shelves and little seismic activity?

• inert

• active

• passive

• fringing

What is the area called that extends from the major land masses underwater (people swim in this area of the ocean)?

• continental shelf

• continental slope

• continental rise

• abyssal plain

What most likely formed submarine canyons?

• earthquake activity

• deep rivers

• turbidity currents

• glacier scorching

The deep, flat expanses of the ocean are called what?

• trenches

• abyssal plain

• submarine canyons

• continental rise

What is the order of the marine provinces from shore to mid-ocean ridge?

• shelf, abyssal plain, rise, slope

• abyssal plain, shelf, rise, slope

• abyssal plain, rise, slope, shelf

• shelf, slope, rise, abyssal plain

A seamount whose peak has eroded and become flat is called...

• abyssal plain

• continental shelf

• guyot

• continental rise

When were hydrothermal vents discovered?

• 1976

• 1977

• 1967

• 1981

Black smoke from hydrothermal vents is due to the presence of these elements...

• calcium carbonate.

• iron, copper, and zinc.

• barium and oxygen.

• silicon and calcium.

What are some organisms found near hydrothermal vents?

• dolphins and whales

• lemon sharks and Christmas tree worms

• serpulid worms, tubeworms, and mussels

What percentage of all marine species home is coral reefs?

• 10%

• 25%

• 50%

• 65%