Properties of Water

Total pressure at 99 feet deep is:

• 4 atm

• 5 atm

• 2 atm

• 3 atm

When water freezes, its volume

• Increases

• Decreases

• Remains constant

• Equals its weight

An object's buoyancy is equal to:

• flotation

• density

• weight of the object

• weight of displaced water

Flotation will occur if the object:

• Has a negative buoyancy

• Has a positive buoyancy

• Has a neutral buoyancy

• Has no buoyancy

Which statement is NOT true at the bottom of the ocean?

• The amount of dissolved gas is less than at the surface

• Pressure keeps water from freezing

• Parameters are more constant

• Density is lower than water at the surfact

An area in the water where photosynthetic output is equal to the respiratory intake (LAST POSSIBLE DEPTH FOR PHOTOSYNTHESIS) is the

• Halocline

• Zone of Compensation

• Thermocline

• Aphotic Zone

What is used as a measure of salinity?

• Potassium

• Calcium

• Salt

• Chlorine

Water pressure is greatest on the:

• Bottom of a closed system

• Bottom of an open system

• Top of a closed system

• Top of a closed system

Bottom dwelling marine animals are often red. Why?

• To be seen more easily

• To absorb more light

• As camoflauge

• To have a bitter taste

Under normal conditions, the most common gas in seawater is

• oxygen

• carbon dioxide

• nitrogen

• chlorine