Geography of the Ocean Floor

What is the geological term for the boundary where two tectonic plates meet under the ocean?

• Subduction zone.

• Divergence zone.

• Transform fault.

• Rift valley.

As the depth of the ocean water increases, what happens to the temperature?

• It increases (warmer).

• It stays the same.

• It decreases (colder).

• It fluctuates randomly.

What is the name of the phenomenon where warm ocean water is replaced by cold, nutrient-rich water from the deep?

• Upwelling

• Downwelling

• Thermal Stratification

• Ocean Circulation

What is the name of the zone in the ocean where light can penetrate and photosynthesis can occur?

• photic zone

• benthic zone

• abyssal zone

• neritic zone

What is the term for the underwater mountain ranges formed by tectonic activity?

• Mid-ocean/Submarine ridges

• Continental shelves

• Oceanic trenches

• Seamounts

What is the term for the landform that erupts above sea level and creates an island?

• Volcanic island

• Coral reef

• Atoll

• Continental shelf

What is the term for the flat, deep areas of the ocean floor?

• Abyssal plains

• Continental shelves

• Oceanic ridges

• Seamounts

What is the name of the ocean layer where temperature changes rapidly with depth?

• Thermocline

• Stratosphere

• Benthic Zone

• Epipelagic Zone

What are the large underwater valleys called that are formed by tectonic activity?

• Oceanic ridges

• Oceanic trenches

• Continental shelves

• Seamounts

What is the area of the ocean floor that is closest to the shore called?

• Continental Shelf

• Oceanic Trench

• Deep Sea

• Mid-Ocean Ridge