Oceanography Mock Quiz

What are continental margins?

• The deepest part of the ocean basin

• Transition zones between continental crust and oceanic crust

• A region where only oceanic crust is found

• The boundary between two continental plates

What is the average minimum temperature of the ocean, even at high depths?

• -2°C

• -5°C

• 0°C

• 4°C

What is the relationship between upwelling and pH?

• The more upwelling, the lower the pH.

• Upwelling increases pH by adding oxygen.

• The higher the pH, the more upwelling

• pH has no connection to upwelling.

Define “Mariana trench”

• The longest underwater mountain range on Earth

• The deepest oceanic trench on Earth

• The scientist who discovered trenches

• A trench located in the Indian Ocean

Why aren’t the continents sinking?

• Because the Earth’s core is solid and prevents sinking

• Because of the gravitational pull from the Moon.

• Because of isostasy

• Because they don't want to :>

What are features of regions with high tectonic activity?

• frequent earthquakes

• High volcanic activity

• Stronger winds

• Warmer weather

What is sediment?

• Gaseous particles produced by phytoplankton.

• Liquid substances that form after volcanic eruptions.

• Organic matter that only forms in the ocean.

• Solid materials from erosion, weathering, and deposition.

What happens to the sedimentation rate as the depth increases?

• The rate of sedimentation increases.

• The rate of sedimentation only depends on salinity.

• The rate of sedimentation decreases.

• There is no sediment in greater depths.

Define “Phytoplankton”

• Animals that live in the deep ocean and do not photosynthesize.

• Tiny underwater plants that consume oxygen.

• Underwater organisms that perform photosynthesis.

• Underwater organisms that perform Cellular respiration.

What is a key feature of mid-oceanic ridges?

• high temperature

• low volcanic activity

• High tectonic activity

• low density