Ocean Salinity and Currents

What is the average salinity of ocean water?

• 7-8 parts per thousand

• 30 parts per thousand

• 35 parts per thousand

• 38 parts per thousand

Which factor primarily contributes to higher ocean salinity in regions like the Mediterranean Sea?

• High rainfall

• Melting icebergs

• High evaporation

• River inflows

What causes lower salinity levels in ocean regions such as the Baltic Sea and polar areas?

• High rates of evaporation

• Abundant sunshine

• Influx of freshwater from rivers, rain, or melting ice

• Deep ocean currents

How does ocean salinity influence the formation of ocean currents?

• Less salty water is denser and sinks, creating currents.

• Saltier water is denser and sinks, creating currents.

• Salinity has no effect on water density or currents.

• Warmer water with high salinity rises, forming currents.

High salinity cold water sinks to the ocean floor.

• True

• False