Chapter 21 Section 1 Review Page 524

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					Chapter 21 Section 1
 Review Page 524
 Ocean Surface Currents
    1. Describe the force that
    drives most surface
    currents.

• Uneven heating of Earth’s
 atmosphere produces wind. As
 winds moves across the ocean they
 transfer energy to the water creating
 surface currents.
  2. Identify the winds that
   affect the surface currents
   on either side of the
   equator.

• The trade wind belts, located north
 and south of the equator push
 surface currents west across all three
 oceans in the tropical latitudes.
 3. Identify the winds that
   affect the surface currents
   in the middle latitudes.

• Prevailing Westerlies are located in
 the mid-latitudes and they push
 ocean currents to the east.
   4. Describe how density
   affects the flow of deep
   currents.

• Denser water is “heavier” and sinks
 below less dense water. This ocean
 motion is the basis for deep-ocean
 currents.
   5. List the factors that
   affect the density of ocean
   water.

• Temperature
• Salinity
• Turbidity
6. Describe how surface
   currents would be affected
   if Earth did not rotate.

• Earth’s rotation causes the path
 surface currents to curve. If Earth
 did not rotate, surface currents
 would flow in straight paths until the
 ran into land.
7. Explain how the distribution
   of solar energy around
   Earth affects ocean surface
   currents.
• Sunlight that shines on Earth adds
 thermal (heat) energy to air.
 Differences in the amount of solar
 radiation leads to uneven heating of
 Earth’s surface. This uneven heating
 pattern creates winds, which drive
 surface currents.
The End!!!!

				
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