Exam 14: Ocean Water and Ocean Life

The rapid change in temperature with depth in the ocean is called the pycnocline.

The density of seawater is controlled by temperature and salinity.

Seaward of the low tide line is called the ________ zone.

Density in seawater is determined by ________.

Clams, sponges, and other bottom-dwelling animals are called benthos organisms.

Discuss variations in temperature and density of seawater with depth in the oceans. Please use Figure 14.3 to help with your discussion. What are the key factors that influence or control temperature and density? Are these variations the same worldwide or are they specific to certain regions? Explain.

The ________ zone is the near-surface zone of the ocean where light is strong enough for photosynthesis to occur.

Productivity is highest in ________.

The ________ zone refers to areas of the ocean, regardless of depth, where animals swim or float freely.

The total amount of solid material dissolved in water is known as ________.

Salinity refers to all of the solid materials in seawater, both dissolved and visible.

The removal of salts and other chemicals to extract fresh water from seawater is called ________.

The area where the land and ocean meet and overlap is called the ________ zone.

A rapid change in temperature with depth in the ocean is called the ________.

________ refers to the mass of all living organisms on Earth.

The upper part of the ocean into which sunlight penetrates is called the photic zone.

Open ocean of any depth where animals swim or float freely is known as the ________ zone.

The most abundant salt in seawater is ________.

Among plankton, animals that drift on ocean currents are specifically known as ________.

________ organisms live on or in the ocean bottom.