NS2-M3C4 - Undersea Landscapes

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.

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

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

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

A smooth appearance

B oceanic crust

C lava cooled rapidly above the Earth's surface

4 Where would you most likely find a guyot?

A Antarctica

B Pacific Ocean

C Atlantic Ocean

D Arctic Ocean

B Pacific 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

B 1 cm; 1000 years

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

C Ocean Ridge

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

C Seamount

8 Rapidly moving underwater currents carrying debris and sediments

A Rapid tides

B True current

C Countercurrent

D Turbidity current

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

B Echo sounder

10 The steep descent of the seabed from the Continental Shelf to the abyssal zone

A Continental Shelf

B Continental Rift

C Continental Slope

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.

C There is not a regular texture.

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

A The continental shelves

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

B The East Pacific Rise

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.

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

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

B Relief Maps

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

D All of the above

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

C abyss

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.

B depth to the ocean bottom.

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.

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

D suddenly