A) have submerged erosional features B) are arc-shaped depressions in the oceanic crust that occur at subduction zones C) consist of glacial troughs dating back to the Ice Age D) are erosional canyons cut by turbidity currents A) have submerged erosional features B) are arc-shaped depressions in the oceanic crust that occur at subduction zones C) consist of glacial troughs dating back to the Ice Age D) are erosional canyons cut by turbidity currents

Exam 3: The Ocean Floor

Paleoceanography is the study of past processes and past events that have occurred in the ocean. What types of questions do paleoceanographers ask and what are the methods they use to obtain information about the ocean's past?

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Question 1

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Deep-sea sediments hold about a 180-million-year history about the ocean, its chemistry, and its inhabitants. Paleoceanographers may ask questions about the history of the ocean and Earth. These questions may range from climate science, to species biology, to geological phenomena, and more. Scientists use many different sampling techniques such as clamshell samplers, piston corers, and deep-sea drilling to extract sediment samples from different depths. Paleoceanographers can infer several types of information held within these sediments including the age of the sediments, the identification of microfossils trapped in the layer of sediments, the historical temperatures of the ocean, and other aspects of past ocean chemistry and behavior. In addition, scientists are currently trying to interpret both oceanic and climate change history. New advances in instrumentation and technologies have enabled scientists to probe deeper into sediments unveiling more information about the ocean of the past.

One area in the ocean that has an extreme abundance of sediment deposition is the .

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Question 2

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Scientists use ocean sediments to obtain information about ocean processes throughout the history of the ocean.

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Large volumes of bottom sediments may be transported long distances by .

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Question 4

Neritic sediments are found on the .

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Question 5

s ediments are found on the deep-ocean floor are mostly in origin .

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Question 6

The Pacific coast of South America has many volcanic mountains and a narrow continental shelf. This is an example of .

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Question 7

Scientists think that turbidity currents contribute to the formation of submarine canyons.

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Question 8

The deepest places in Earth's crust are .

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Question 9

Continental shelves can be made of granitic crust, basaltic crust, or both.

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Question 10

Over millions of years, natural gas and oil can be formed from .

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Question 11

Which of the following is a major source of terrigenous sediments?

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Question 12

Which statement accurately describes a turbidity current?

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Question 13

Ocean trenches .

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Question 14

The deep-ocean basin includes which of the following features?

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Question 15

What methods do scientists use to determine the bathymetry of the ocean floor, and how do they work?

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Question 16

The mid-ocean mountains, such as the ridges and rises, are .

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Question 17

Which type of sediment is generated in place, on the spot where we find them?

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Question 18

The only way in which calcium carbonate sediment can form is by evaporation.

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Question 19

The deepest location in the ocean is the .

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Question 20

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Paleoceanography is the study of past processes and past events that have occurred in the ocean. What types of questions do paleoceanographers ask and what are the methods they use to obtain information about the ocean's past?

One area in the ocean that has an extreme abundance of sediment deposition is the .

Scientists use ocean sediments to obtain information about ocean processes throughout the history of the ocean.

Large volumes of bottom sediments may be transported long distances by .

Neritic sediments are found on the .

s ediments are found on the deep-ocean floor are mostly in origin .

The Pacific coast of South America has many volcanic mountains and a narrow continental shelf. This is an example of .

Scientists think that turbidity currents contribute to the formation of submarine canyons.

The deepest places in Earth's crust are .

Continental shelves can be made of granitic crust, basaltic crust, or both.

Over millions of years, natural gas and oil can be formed from .

Which of the following is a major source of terrigenous sediments?

Which statement accurately describes a turbidity current?

Ocean trenches .

The deep-ocean basin includes which of the following features?

What methods do scientists use to determine the bathymetry of the ocean floor, and how do they work?

The mid-ocean mountains, such as the ridges and rises, are .

Which type of sediment is generated in place, on the spot where we find them?

The only way in which calcium carbonate sediment can form is by evaporation.

The deepest location in the ocean is the .

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