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3) Discuss the development of scientific instruments in the 20th century used to map the seafloor.
Include in your answer the timeframe when each instrument was developed and a brief
description of how it works.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.1 What Techniques Are Used to Determine Ocean Bathymetry?
Essent'l Concept: 3.1 Discuss the techniques that are used to determine ocean bathymetry
Global Sci Out: 8
4) Describe the characteristics and features of the oceanic ridge system, including the difference
between oceanic ridges and oceanic rises.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.4 What Features Exist Along the Mid-Ocean Ridge?
Essent'l Concept: 3.4 Describe the sea floor features that exist along the mid-ocean ridge
Global Sci Out: 8
31
5) List and describe the different types of hydrothermal vents.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.4 What Features Exist Along the Mid-Ocean Ridge?
Essent'l Concept: 3.4 Describe the sea floor features that exist along the mid-ocean ridge
Global Sci Out: 8
6) Describe the differences between passive and active continental margins and how these
features relate to plate tectonics.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.2 What Features Exist on Continental Margins?
Essent'l Concept: 3.2 Describe the sea floor features that exist on continental margins
Global Sci Out: 8
7) Briefly describe how submarine canyons are created.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.2 What Features Exist on Continental Margins?
Essent'l Concept: 3.2 Describe the sea floor features that exist on continental margins
Global Sci Out: 8
32
8) Distinguish between a transform fault and a fracture zone.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.4 What Features Exist Along the Mid-Ocean Ridge?
Essent'l Concept: 3.4 Describe the sea floor features that exist along the mid-ocean ridge
Global Sci Out: 8
9) Describe the major features of a passive continental margin as you move from the continent
toward the center of the ocean basin.
Bloom's Taxonomy: Remembering/Understanding
Section: 3.2 What Features Exist on Continental Margins?
Essent'l Concept: 3.2 Describe the sea floor features that exist on continental margins
Global Sci Out: 8
10) In which ocean basin are most ocean trenches found? Use plate tectonic processes to explain
why.
Answer: In convergent active margins the continental slope descends into a long, narrow, steep-
sided ocean trench. Ocean trenches are deep linear scars in the ocean floor, caused by the
collision of two plates along convergent plate margins. The landward side of the trench rises as a
volcanic arc that may produce islands (such as the islands of Japan, an island arc) or a volcanic
mountain range along the margin of a continent (such as the Andes Mountains, a continental arc).
The deepest portions of the world's oceans are found in these trenches. The majority of ocean
trenches are found along the margins of the Pacific Ocean and only a few exist in the Atlantic
and Indian Oceans.
Diff: 2
Bloom's Taxonomy: Remembering/Understanding
Section: 3.3 What Features Exist in the Deep-Ocean Basins?
Essent'l Concept: 3.3 Describe the sea floor features that exist in the deep-ocean basins
Global Sci Out: 8
33
Copyright © 2017 Pearson Education, Inc.
3.4 Visual Questions
1)
Which of the following techniques used to determine ocean bathymetry is illustrated in the
image?
A) Magnetometer
B) Multibeam Sonar
C) Seismic Reflection
D) Side-scan Sonar
E) Sounding
Bloom's Taxonomy: Applying/Analyzing
Section: 3.1 What Techniques Are Used to Determine Ocean Bathymetry?
Essent'l Concept: 3.1 Discuss the techniques that are used to determine ocean bathymetry
34
2)
Which of the following techniques used to determine ocean bathymetry is illustrated in the
image?
A) Magnetometer
B) Multibeam Sonar
C) Seismic Reflection
D) Side-scan Sonar
E) Sounding
Bloom's Taxonomy: Applying/Analyzing
Section: 3.1 What Techniques Are Used to Determine Ocean Bathymetry?
Essent'l Concept: 3.1 Discuss the techniques that are used to determine ocean bathymetry
35
3)
Which of the following techniques used to determine ocean bathymetry is illustrated in the
image?
A) Magnetometer
B) Multibeam Sonar
C) Seismic Reflection
D) Side-scan Sonar
E) Sounding
Bloom's Taxonomy: Applying/Analyzing
Section: 3.1 What Techniques Are Used to Determine Ocean Bathymetry?
Essent'l Concept: 3.1 Discuss the techniques that are used to determine ocean bathymetry
36
4)
Which of the following techniques is used to determine the ocean data shown on the map?
A) Magnetometer
B) Multibeam Sonar
C) Seismic Reflection
D) Side-scan Sonar
E) Satellite-derived gravity
Bloom's Taxonomy: Applying/Analyzing
Section: 3.1 What Techniques Are Used to Determine Ocean Bathymetry?
Essent'l Concept: 3.1 Discuss the techniques that are used to determine ocean bathymetry
37
