Exam 3: The Aquatic Environment

A ________ tide occurs when the Moon and Sun are at right angles to the Earth.

An organism that lives in a deep marine environment may exhibit all the following physical characteristics,except

An aquifer refers to

Salinity is higher in an estuary than in the ocean.

The primary sources of oxygen in a water body are the atmosphere and

Aquatic organisms are unable to tolerate low pH conditions largely because acidic waters contain high concentrations of ________.

The individual atoms of a water molecule are held together by

The process by which water travels in a sequence from the air to Earth and returns to the atmosphere is referred to as the ________ cycle.

The density of water is greatest at

In the open ocean,concentrations of oxygen reach a minimum value of 500-1000 m,a region referred to as the oxygen ________.

Most of Earth's water resides in

In comparison with the epilimnion of a lake,the water of the hypolimnion is

Aquatic organisms are unable to tolerate low pH conditions mainly because acidic waters contain high concentrations of toxic

The movement of molecules from an area of high concentration to an area of low concentration is called ________.

Tides are highest and lowest during a spring tide,when the Sun and Moon are aligned with the Earth.

An underground layer of permeable,water-bearing substrate is known as a(n)________.

Aquatic organisms generally require less structural support (e.g.,skeletons)due to water's high

Upwelling occurs in the equatorial waters of the ocean.

Of the visible light spectrum,blue wavelengths penetrate the deepest into water.

About 75% of the Earth's surface is covered by