Seafloor Features and Oceanography

The video explores the seafloor, focusing on techniques like sonar for mapping. It discusses the structure and features of continental shelves, passive and active margins, and the characteristics of the Atlantic, Indian, and Pacific Oceans. The video highlights the differences between passive and active margins, the formation of abyssal plains, and the geological activity in subduction zones.

What is the primary method used to determine the bathymetry of the seafloor?

• Direct sampling

• Magnetic field analysis

• Satellite imagery

• Sonar technology

How do satellites indirectly measure seafloor bathymetry?

• By detecting sound waves

• By measuring the strength of gravity

• By capturing images of the seafloor

• By analyzing water temperature

What is the continental shelf primarily composed of?

• Basaltic lava

• Volcanic rock

• Sediment from rivers

• Coral reefs

What is the term for the deep channels carved by turbidity currents?

• Continental slopes

• Submarine canyons

• Ocean trenches

• Rift valleys

What is a characteristic feature of passive continental margins?

• Frequent volcanic eruptions

• Deep ocean trenches

• Narrow continental shelves

• Wide continental shelves

What is a common feature of active continental margins?

• Lack of sediment deposition

• Frequent earthquakes

• Wide continental shelves

• Stable tectonic activity

What geological feature is found at the center of the Atlantic Ocean?

• Continental rise

• Subduction zone

• Mid-ocean ridge

• Abyssal plain

What happens to the seafloor as it moves away from the mid-ocean ridge?

• It sinks and forms trenches

• It becomes warmer and younger

• It becomes colder and older

• It rises and forms mountains

Which ocean is surrounded by the Ring of Fire?

• Atlantic Ocean

• Indian Ocean

• Pacific Ocean

• Arctic Ocean

Which ocean has only one subduction zone near Indonesia?

• Atlantic Ocean

• Indian Ocean

• Pacific Ocean

• Southern Ocean