Name ___________________________ Class ___________________ Date _____________

Chapter 16 The Dynamic Ocean

Section 16.1 Ocean CirculationThis section discusses how movements of surface and deep-ocean watersoccur.

Reading StrategyIdentifying Main Ideas As you read, write the main idea of eachtopic in the table. For more information on this Reading Strategy, seethe Reading and Study Skills in the Skills and Reference Handbookat the end of your textbook.

Surface Circulation1. Is the following sentence true or false? Friction between the

ocean and the wind blowing across its surface cause ocean surfacecurrents.

Match each definition with its term.Definition Term

2. large whirl of water within an ocean basin

3. mass of ocean water that flows from place to place

4. rising of cold, deep ocean water to replace warmer surface water

5. horizontal water movement in the upper part of the ocean’s surface

© Pe

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Earth Science Guided Reading and Study Workbook ■ 119

Topic Main Idea

Surface currents a.

Gyres b. .

Ocean currents and climate c.

Upwelling d.

a. gyreb. upwellingc. surface currentd. ocean current

6. Select the appropriate letter on the map that identifies each of thefollowing ocean currents.

North Atlantic Gyre North Pacific GyreSouth Atlantic GyreSouth Pacific Gyre Indian Ocean Gyre

7. How does the Coriolis effect impact ocean currents in the Northern and Southern Hemispheres?

8. Ocean currents moving from low-latitude to higher latitude regions transfer from warmer to cooler areas.

9. Is the following sentence true or false? Winds cause upwelling,which in turn causes an increase in dissolved nutrients at theocean surface.

Deep-Ocean Circulation10. What are density currents?

11. Ocean water can increase in density as a result of a decrease intemperature or a(n) in salinity.

12. Circle the letter of the area where the ocean water with the highest density occurs. a. at the equator b. near Antarcticac. in the Mediterranean Sea d. near Australia

S. Equatorial C.

California C.

N. Pacific C.

West Wind Drift

Gul

f Stream

Warm

Cold60˚

40˚

20˚

0˚

20˚

40˚

60˚East Wind Drift

80˚

80˚

120°60°0°30˚150° 120°

60˚

40˚

20˚

0˚

20˚

40˚

60˚

80˚

80˚

30˚60°90° 90° 150°

120°60°0°30˚150° 120° 30˚60°90° 90° 150°

East Wind Drift

West Wind

N. Equatorial C.

N. Equatorial C.

Alaskan

C.

W. A

ustr

alia

nC

.

S. Equatorial C.

N. Equatorial C.

S. Equatorial C.B

enguelaC

.

Peru

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.N. Atlantic C.

Labrador C. E. Gree

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Norwegian

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CanaryC

.

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.

Leeu

win

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ustr

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Kuroshio C.Oya

shio

C.

A

B

D

C

E

Name ___________________________ Class ___________________ Date _____________

Chapter 16 The Dynamic Ocean©

Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.

Earth Science Guided Reading and Study Workbook ■ 120