Multiple Choice
When does the Northern Hemisphere receive the fewest direct rays from the Sun?
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48. Ecology
Introduction to Ecology
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Which of the following is the primary cause of surface currents in the world's oceans?
A
Tidal forces from the Moon
B
Wind patterns
C
Earth's magnetic field
D
Seafloor topography
Verified step by step guidance1
Understand the concept of surface currents: Surface currents are horizontal movements of water that occur at or near the ocean's surface. They are primarily driven by external forces acting on the water.
Eliminate incorrect options: Tidal forces from the Moon primarily cause tidal movements, not surface currents. Earth's magnetic field does not influence ocean currents directly. Seafloor topography affects deep ocean currents but not surface currents.
Focus on wind patterns: Wind patterns are the primary cause of surface currents. Winds exert force on the ocean's surface, creating friction that moves the water horizontally.
Learn about the Coriolis effect: The Earth's rotation causes the Coriolis effect, which influences the direction of surface currents, causing them to curve rather than move in straight lines.
Understand global wind systems: Global wind patterns, such as trade winds and westerlies, play a significant role in driving surface currents across the world's oceans.
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