Exam 3: The Aquatic Environment

Precipitation that reaches the soil moves into the ground by ________.

The salinity in an estuary varies vertically and horizontally.

________ solutions are those that have a higher concentration of OH⁻ (hydroxyl ions)than H⁺ ions.

The water of the epilimnion is ________ than the water of the hypolimnion.

The density of seawater increases when

A high pH indicates a very acidic solution.

The primary ions that contribute to the salinity of ocean waters are

Describe several adaptations that organisms have developed in response to the minimal light environments in deep water.

Water is the dominant environment on Earth and covers ________ of the Earth's surface.

Individual water molecules are held together by covalent bonds.

The physical movements of water caused by the gravitational pull of the Sun and the Moon are called ________.

Use examples to describe several physical and chemical properties of water that affect life on Earth.

The abundance of hydrogen ions in solution is a measure of ________.

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

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

Define an estuary, and describe how gradients in salinity are maintained.

Compare the temperature profile of Lake Tahoe (on the border of California and Nevada)in each season and explain why the profiles change.

Most of Earth's water resides in

Freshwater has a higher concentration of solutes than seawater.

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