NS2-M3C4 Undersea Landscapes (Exam)



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NS2-M3C4 - Undersea Landscapes (Exam) Page 1
Name:______________________________ Date:_______________________________
1 Continental shelves may provide food, fuel, and minerals, and may extend just under a mile

(off the California coast), or upwards of 800 miles (off the Arctic coast of Russia). What

have most maritime nations agreed to regarding the continental shelf being a part of the

land?
A It is part of the land out to a depth of 200 meters

B It is not a part of the land.

C The entire shelf is part of the land.

D It is part of the land if it contains fuel.
2 The deep ocean floor (the true bottom of the ocean) begins at the bottom of the

__________ and extends seaward.


A continental rise

B continental floor

C continental shelf

D continental slope


3 Which of the following describe basaltic rock?

(Input all that apply, then push the ENTER button.)


A smooth appearance

B oceanic crust

C lava cooled rapidly above the Earth’s surface

D speckled whitish color


4 Where would you most likely find a guyot?
A Antarctica

B Pacific Ocean

C Atlantic Ocean

D Arctic Ocean


5 Studying sediment core samples can provide a history of the oceanic area. In the North

Atlantic Ocean, the sediment accumulates slowly- about _______ of sediment in

_________.
A 1 cm; 100 years

B 1 cm; 1000 years

C 1 m; 1000 years

D 1 m; 100 years


NS2M3C4 - Undersea Landscapes (Exam) Page 2
6 A very large mountain range running along the center of the ocean floor
A Coral Reef

B Ocean Peaks

C Ocean Ridge

D Glaciation


7 A former coral island which has been eroded and subsided below the surface of the ocean.
A Atoll

B Submerged waterfall

C Seamount

D Ocean eruption


8 Rapidly moving underwater currents carrying debris and sediments
A Rapid tides

B True current

C Countercurrent

D Turbidity current


9 A device for measuring depth of water by sending sound waves down from the surface and

recording the time until the echo returns from the bottom


A Fathom meter

B Echo sounder

C Depth meter
10 The steep descent of the seabed from the Continental Shelf to the abyssal zone
A Continental Shelf

B Continental Rift

C Continental Slope
11 What is the general texture of continental shelves?
A Irregular slopes

B Smooth terrain

C There is not a regular texture.

D Repeating patters of ridges and valleys.

NS2M3C4 - Undersea Landscapes (Exam) Page 3
12 In what part of the oceans do most of the sea vegetation and saltwater fishes and animals

exist?
A The continental shelves

B There is an even distribution of life throughout all of the areas of the oceans

C The deep ocean floor

D The continental slopes

E The abyss


13 What is the main underwater feature in the southern and southeastern Pacific Ocean?
A The Australia Ridge

B The East Pacific Rise

C The Mid-Atlantic Ridge

D The Mid-Indian Ocean Ridge


14 What is the main difficulty to bringing up the valuable nodules located on the bottom of the

Pacific Ocean?


A Without adequate light it is difficult to spot them in the deep ocean.

B They lie in water so deep they cannot be easily retrieved.

C They are easily damaged and difficult to bring up in their pure form.

D There is no difficulty. They are mined each year in great quantities.

E They weigh so much that it is difficult to get strong enough cable to bring

them up.
15 What type of map shows different heights of the earth's surface using shading, colors or

lines?
A Contour Maps

B Relief Maps

C Navigational Maps

D Mercator Projections


16 How are submarine canyons formed?
A Glaciation

B Underwater currents and landslides

C Tidal currents

D All of the above

E None of the above

NS2M3C4 - Undersea Landscapes (Exam) Page 4


17 The bottom of the ocean is referred to as the deep ocean, the deep sea, the deep ocean

basin or the


A height

B summit


C abyss

D seamount


18 Echo sounding is used to determine the
A physical and chemical properties of the sea.

B depth to the ocean bottom.

C speed of water as it moves.

D speed of sound in water.


19 Coring tubes are used to
A collect sands from the continental shelf and slope.

B collect water samples.

C collect ocean bottom sediments at different depths.
20 Beyond the continental shelf, the ocean bottom drops off
A not at all

B very gradually

C about 7 to 10 feet per mile

D suddenly


NS2M3C4 - Undersea Landscapes (Exam) Page 5


Answer Key: NS2M3C4 - Undersea Landscapes (Exam)
Question: Answer
1 A
2 D
3 ABC
4 B
5 B
6 C
7 C
8 D
9 B
10 C
11 C
12 A
13 B
14 B
15 B
16 D
17 C
18 B
19 C
20 D

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