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Water flows downhill from the mound of water in the subtropical gyre. A balance between the __________ forces, known as geostrophic flow, eventually drives this current.

Today, Exclusive Economic Zones (EEZ) __________.

Where a decrease in temperature with depth is responsible for the density increase with depth, the pycnocline is also a ___________.

Kinetic energy transferred from near surface winds to the ocean’s surface layer drives __________.

The hydrosphere includes:

Early methods used by fishery managers to control fish production included all of the following except for __________.

The Southern Oscillation refers to the difference in surface air pressure between __________.

Sustainability is __________.

During the Medieval Warm Period (CE 950-1250), the Vikings sailed across the North Atlantic reaching all areas except for ___________.

Piloted and unpiloted submersible vehicles of the 21st century include all except for __________.