A surface current is set in motion by differences in salinity and temperature

A surface current moves cold water away from Earth's poles.

Deep ocean currents slowly move water along the bottom of Earth's oceans.

An upwelling moves nutrients from the surface to deeper waters.

The Gulf Stream moves warm water away from the poles to give Great Britain a mild climate

Ocean water contains

Which of the following would lower the salinity of a shallow part of an ocean?

In general, how does ocean temperature change with depth?

Which of these best describes the ocean floor?

Which of these would be most useful to explore a deep and difficult-to-reach section of the mid-ocean ridge?

Most ocean waves are the result of

Waves breaking along a shore are caused by an increase in their

What causes tides?

The tidal bulge is smaller than normal during a

The difference in height between a high tide and the next low tide is called the

The Moon has a greater effect on Earth's tides than the Sun because the Moon is

Water waves are often a transfer of

A surface current near Earth's equator is set in motion by

Which of the following affects climate the most?

Which of the following best describes El Niño?

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