Question

4 which of the following is one difference between a deep current and a surface current? a deep currents flow slowly in circuits around the globe; surface currents move in gyres b deep currents flow quickly in circuits around the globe; surface currents move in one direction c deep currents flow in one direction around the globe; surface currents change directions frequently

Explanation:

To determine the difference between deep currents and surface currents:

• Recall ocean current knowledge: Deep currents (thermohaline circulation) flow slowly in global circuits. Surface currents form gyres (large circular systems) due to wind, Coriolis effect, etc.
• Analyze options:
• Option A: Matches the correct characteristics (deep currents slow, global circuits; surface currents in gyres).
• Option B: Deep currents do not flow quickly, and surface currents form gyres (not one direction).
• Option C: Deep currents don’t flow in one direction globally in a simple way, and surface currents follow gyres (don’t change direction frequently).

Answer:

A. Deep currents flow slowly in circuits around the globe; surface currents move in gyres