# Ocean Floor - Test Yourself

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Oceanfloor
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Quizzes Created: 1 | Total Attempts: 1,669
Questions: 10 | Attempts: 1,669

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A quiz to test yourself on Earth Science material regarding the Ocean Floor, for review.

• 1.

### Oceanography is a specific branch of geology.

• A.

True

• B.

False

B. False
Explanation
Oceanography is the interdisciplinary science that uses information and knowledge of geology, physics, chemistry, and biology to better understand our oceans.

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• 2.

### The Northern Hemisphere is often referred to as the land hemisphere.

• A.

True

• B.

False

A. True
Explanation
This is in constrast to the Southern "water" Hemisphere where approximately 80% of the surface is water.

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• 3.

### We can use sonar to study the ocean floor because

• A.

We know the speed of sound in water

• B.

We know how big the ship is

• C.

Satellites provide the rate of gravity

• D.

We have detailed maps of the complete seafloor

• E.

We can't measure the depth

A. We know the speed of sound in water
Explanation
The speed of sound in water is about 1500 meters/second.

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• 4.

### Which one of the following water bodies is the largest ocean?

• A.

Arctic Ocean

• B.

Atlantic Ocean

• C.

Aral Sea

• D.

Indian Ocean

• E.

Pacific Ocean

E. Pacific Ocean
Explanation
The Pacific Ocean is the largest ocean in the world. It covers an area of approximately 63.8 million square miles, which is more than twice the size of the second-largest ocean, the Atlantic Ocean. The Pacific Ocean is also the deepest ocean, with the Mariana Trench reaching a depth of about 36,070 feet. It is located between the eastern coastlines of Asia and the western coastlines of the Americas. The Pacific Ocean is known for its vastness and is home to numerous islands and marine life.

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• 5.

### The measurement of ocean depths and the charting of the shape or topography of the ocean floor is

• A.

Altimetry

• B.

Oceanography

• C.

Sonimetry

• D.

Bathymetry

• E.

None of the above

D. Bathymetry
Explanation
Bathymetry is the correct answer because it refers to the measurement and mapping of the depths and topography of the ocean floor. Altimetry is the measurement of altitude, oceanography is the study of the ocean and its phenomena, and sonimetry is not a recognized term. Therefore, bathymetry is the most appropriate term for the given context.

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• 6.

### Which of the following is not considered one of the four main ocean basins?

• A.

Asiatic

• B.

Indian

• C.

Arctic

• D.

Pacific

• E.

Atlantic

A. Asiatic
Explanation
The Pacific Ocean is the largest single geographic feature on the planet and is connected to several marginal seas.

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• 7.

### The ____________ are likely the most level places on Earth.

• A.

Guyots

• B.

Continental slopes

• C.

Mid-ocean ridges

• D.

Deep-ocean trenches

• E.

None of the above

E. None of the above
Explanation
You might be flat out of luck if you don't know the key term to match this definition. Review information about the ocean basins.

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• 8.

### The mid-ocean ridge winds through all major oceans.

• A.

True

• B.

False

A. True
Explanation
Seafloor spreading occurs in these high heat flow areas.

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• 9.

### The true edge of the continent is the continental slope.

• A.

True

• B.

False

A. True
Explanation
A portion of the continental landmass and associated sediments is submerged underneath the coastal waters.

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• 10.

### Downslope movements of dense, sediment-laden water are known as ____________ currents.

• A.

Avalanche

• B.

Sediment

• C.

Longshore

• D.

Density

• E.

Turbidity

E. Turbidity
Explanation
With so much sediment, it is a fast-tumbling, muddy mess carried along underwater by these currents.

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• Current Version
• Mar 22, 2023
Quiz Edited by
ProProfs Editorial Team
• Mar 23, 2009
Quiz Created by
Oceanfloor

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