Oceanography and Continental Margin Features Quiz

Pacific Ocean is the largest ocean by area, covering more than a third of the Earth's surface.

The average depth of the world's oceans is approximately 3,500 meters.

Approximately 70% of Earth's surface is covered by oceans.

The Gulf Stream is a warm ocean current that transports water from the Gulf of Mexico to the North Atlantic, influencing climate in the region.

The Mariana Trench is the deepest known part of the Earth's oceans, reaching depths of over 10,000 meters.

Mid-ocean ridges are not continental margin features; they are underwater mountain ranges formed by tectonic activity.

Submarine canyons are primarily formed by the erosion caused by turbidity currents, which are fast-moving currents carrying sediment.

The Mid-Atlantic Ridge is an underwater mountain range that runs through the Atlantic, Indian, and Southern Oceans, formed by tectonic activity.

Wind speed does not directly influence the density of seawater; factors like salinity and temperature are more significant.

The tundra is not a marine ecosystem; it is a terrestrial biome characterized by low temperatures and permafrost.

A subduction zone is formed when one tectonic plate is forced beneath another, usually resulting in deep ocean trenches.

Volcanic eruptions do not significantly contribute to the salt content of seawater; sources include erosion, river runoff, and hydrothermal vents.

Upwelling is the process by which nutrient-rich waters from the deep ocean are brought to the surface, supporting marine productivity.

Temperature is the primary factor determining the density stratification of seawater, with colder water being denser than warmer water.

The Gakkel Ridge is an underwater ridge system located in the Arctic Ocean, formed by tectonic activity along the Mid-Atlantic Ridge.