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Chapter 21 Section 1 Handout
Ocean Currents
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1 A horizontal movement of water in a well-defined pattern is called a(n) current
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2 What are two ways that oceanographers identify ocean currents?
By Studying the physical and chemical characteristics of the ocean water By mapping the path of debris that comes from ships.
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3 What are the two major categories of ocean currents? deep currents
surface currents
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4 Currents that are driven by wind and move horizontally on or near the ocean’s surface are called surface currents
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5 The following factors control surface currents? Air currents
Location of the continents Earth’s rotation
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6 All surface currents are affected by winds.
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7 Explain what causes winds to form. Uneven heating of the atmosphere.
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8 How does wind make water on the ocean’s surface move?
Kinetic energy is transferred from the air to the ocean.
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Numbers I H K C D B G E F J J A
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33 A current that is uninterrupted by any continents and crosses all three major oceans is the __________________. Antarctic Circompolar Current.
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34 Currents in the northern Indian Ocean are governed by _________, which are winds whose direction change seasonally. monsoons
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35 The Gulf Stream, the North Atlantic Current, the Canary Current, and the North Equatorial Current form the ______. North Atlantic Gyre.
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36 A vast are of calm, warm water at the center of the North Atlantic Gyre is called the ____________. Sargasso Sea.
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