Front

What are semidiurnal tides?

Back

Tides where both high tides rise to the same level and both low tides fall to the same level.

Front

What are subsurface currents?

Back

Ocean currents that flow beneath the surface.

Front

What two main factors determine the density of seawater?

Back

Salinity and temperature.

Front

What is a turbidity current?

Back

An unusual density current that occurs when mud or silt mixes with seawater.

Front

What are trenches in oceanography?

Back

Huge, muddy valleys cutting through portions of the abyssal plains.

Front

What are surface currents?

Back

Ocean currents that flow on the surface of the water.

Front

What are the effects of salinity on seawater density?

Back

Higher salinity increases the density of seawater.

Front

How does temperature affect seawater density?

Back

Colder water is denser than warmer water.

Front

What is the difference between neap tides and spring tides?

Back

Neap tides occur when the sun and moon are at right angles, resulting in lower high tides, while spring tides occur when the sun and moon are aligned, resulting in higher high tides.

Front

What is upwelling?

Back

The process where deep, cold water rises to the surface, often bringing nutrients.