Question

3 group the labels according to the current system they describe. takes 1,000 years for full rotation primarily caused by wind always moving flows 100 meters beneath ocean surface powered by temperature and density spins clockwise in the northern hemisphere surface current both global conveyor belt more ↓

Explanation:

To solve this, we analyze each label based on the characteristics of surface currents, the global conveyor belt (a deep - ocean current), and their commonalities:

Surface Current:

• Primarily caused by wind: Surface ocean currents are mainly driven by wind forces.
• Spins clockwise in the Northern Hemisphere: Due to the Coriolis effect, surface currents in the Northern Hemisphere rotate clockwise.

Both (Surface Current and Global Conveyor Belt):

• Always moving: Both surface currents and the global conveyor belt (which is part of the deep - ocean circulation) are in a state of continuous motion as part of the ocean's circulation system.

Global Conveyor Belt:

• Takes 1,000 years for full rotation: The global conveyor belt, a slow - moving deep - ocean circulation system, takes a long time (around 1000 years) to complete one full cycle.
• Flows 100 meters beneath ocean surface: It is a deep - ocean current that flows below the surface (typically starting around 100 meters depth and going deeper).
• Powered by temperature and density: The global conveyor belt is driven by differences in water temperature (thermo - ) and density (haline - ), which is the basis of thermohaline circulation.

Answer:

• Surface current: Primarily caused by wind, Spins clockwise in the Northern Hemisphere
• Both: Always moving
• Global conveyor belt: Takes 1,000 years for full rotation, Flows 100 meters beneath ocean surface, Powered by temperature and density