Ocean Floor and Continental Margins Quiz

What is the term used to describe the mapping and description of the ocean bottom?

• Bathymetry

• Seafloor

• Geology

• Topography

What percentage of the ocean bottom has been mapped by sonar?

• 5%

• 15%

• 25%

• 35%

What type of crust is the oceanic crust made of?

• Basaltic

• Granitic

• Sedimentary

• Metamorphic

What is the average depth of the abyssal plains?

• 1,000 meters

• 2,000 meters

• 3,000 meters

• 4,000 meters

What is the name given to mountains that rise more than a thousand meters above the ocean floor?

• Abyssal hills

• Sea mounts

• Volcanic arcs

• Transform faults

What is the name of the deepest point on Earth located in the western Pacific?

• Mariana Trench

• Hudson Submarine Canyon

• Mount Everest

• Grand Canyon

What type of margin occurs where there is tectonic activity on the boundary between the oceanic and continental plates?

• Active margin

• Passive margin

• Convergent margin

• Divergent margin

What is the name of the area at the edge of the continents that is covered by a thick wedge of sediment?

• Continental shelf

• Continental slope

• Continental rise

• Continental margin

What is the term used to describe the underwater avalanches of muddy water and rocks that carve the submarine canyons?

• Turbidity currents

• Echo sounders

• Sonar

• Dredges

What is the name of the transition zone between the edge of the continental margin and the deep ocean basin?

• Mid-ocean ridge

• Continental slope

• Continental shelf

• Continental rise