Geological Features and Oceanic Processes

The video explores the seafloor, focusing on techniques like sonar and seismic waves for mapping. It discusses the formation of continental shelves, abyssal plains, and the differences between active and passive margins. The video also examines the seafloor features of the Atlantic, Indian, and Pacific Oceans, highlighting the absence of subduction zones in the Atlantic and the presence of the ring of fire in the Pacific.

What is the primary method used to determine the age of seafloor rocks?

• Chemical analysis

• Satellite imagery

• Magnetism from the sea surface

• Direct sampling

What is the term used to describe the vertical relief on the ocean floor?

• Cartography

• Topography

• Bathymetry

• Geography

What is the main difference between active and passive continental margins?

• Depth of the ocean

• Presence of subduction zones

• Amount of sediment

• Width of the continental shelf

What is the continental rise?

• A flat area on the continental shelf

• A narrow trench near the continental shelf

• An apron of sediment at the base of the continental slope

• A steep slope leading to the abyssal plain

Why are the continental shelves in the Atlantic Ocean particularly wide?

• Because of strong ocean currents

• Due to active subduction zones

• As a result of frequent volcanic activity

• Because of the ocean's age and passive margins

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

• A volcanic island

• A mid-ocean ridge

• A deep trench

• A large coral reef

What is a significant geological hazard in the Indian Ocean near Indonesia?

• Severe droughts

• Frequent hurricanes

• Large earthquakes and tsunamis

• Massive landslides

What is a triple junction in the context of oceanic ridges?

• A site with three major ocean currents

• A region with three deep trenches

• A location with three active volcanoes

• A point where three tectonic plates meet

What is the 'Ring of Fire' known for?

• Subduction zones and volcanic activity

• Deep ocean trenches

• Wide continental shelves

• Calm seas and gentle slopes

What type of margin is found along the Pacific coast of North America?

• Active margin with subduction

• Passive margin with sediment accumulation

• Transform margin with earthquakes

• Divergent margin with spreading centers