Seawater

Front

The midnight zone is also known as the __________________ zone.

Back

aphotic

Front

What is the temperature, salinity, and density like at the surface zone of the ocean (top) as compared to the deep zone (bottom) of the ocean?

Back

warmer temperature, less salinity, and less dense

Front

This fish pictured is an example of:

Back

Benthic life

Front

In addition to salinity, what factor affects the density of seawater?

Back

temperature

Front

How is nitrogen "fixed" into a usable form for plants?

Back

Through action of bacteria and lightning

Front

What is the primary component of seawater?

Back

Water (H2O)

Front

What is salinity?

Back

The concentration of salts in seawater, usually expressed in parts per thousand (ppt).

Front

What is the thermocline?

Back

A layer in the ocean where temperature changes rapidly with depth.

Front

What is the difference between pelagic and benthic zones?

Back

Pelagic zones are open ocean areas, while benthic zones refer to the ocean floor.

Front

What role do phytoplankton play in the ocean ecosystem?

Back

They are primary producers that convert sunlight into energy through photosynthesis.