Exploring the Depths: The Ocean Floor

What is the name of the flat or gently sloping area that extends from the outer edge of the continental margin to the deep ocean floor?

• Abyssal plain

• Continental shelf

• Oceanic ridge

• Trench

Which feature is formed by the collision of two tectonic plates where one is forced beneath the other?

• Mid-ocean ridge

• Oceanic trench

• Seamount

• Continental shelf

What is the term for underwater mountains that rise from the ocean floor but do not reach the surface?

• Islands

• Seamounts

• Continental slopes

• Plateaus

What is the largest mountain range on Earth, located on the ocean floor?

• The Andes

• The Himalayas

• The Mid-Atlantic Ridge

• The Rocky Mountains

What is the process by which new ocean floor is created at a mid-ocean ridge called?

• Subduction

• Erosion

• Sea-floor spreading

• Continental drift

Which of the following is rich in marine life due to upwelling of nutrient-rich waters?

• Oceanic trenches

• Abyssal plains

• Continental shelves

• Mid-ocean ridges

What are hydrothermal vents primarily known for?

• Emitting cold water

• Being found in freshwater lakes

• Releasing heated water and minerals from the Earth's crust

• Causing tsunamis

What is the steep slope leading from the edge of the continental shelf down to the ocean floor called?

• Continental rise

• Continental slope

• Oceanic plateau

• Submarine canyon

What are the deep, underwater canyons found on the ocean floor that are often the extensions of river valleys called?

• Submarine canyons

• Oceanic trenches

• Abyssal plains

• Seamounts

Which of the following is a flat-topped seamount?

• Guyot

• Atoll

• Reef

• Archipelago