Quiz 12 Review Flashcards
It rains for days at the equator. The buoyancy of the surface waters:
• Increase
• Decrease
• Stay the same
Increase
The upward force exerted on a parcel of fluid or on an object immersed within a fluid is called:
Buoyancy
The amount of matter that occupies a given volume of space defines its: • Density • Volume • Area • Mass • Physical state
Density
An imaginary column of water from the ocean surface to depth is referred to as the: • Mixed layer • Thermocline • Pycnocline • Water column
Water column
The two principal controls on sea water salinity are:
• Evaporation and precipitation
• Surface heating and evaporation
• Runoff and river flow
Evaporation and precipitation
The density of freshwater reaches a maximum at: • 0i C • 32i C • 4i C • -1.9i C
4i C
A treasure hunter finds a million bars of gold in a treasure chest. To life the chest, she needs:
• Positive buoyancy
• Neutral buoyancy
• Negative buoyancy
Positive buoyancy
Water Parcel A has a temperature of 28i C. Water Parcel B has a temperature of 15i C. Water Parcel C has a temperature of 23i C. Which of the following represents a stable water column? • A at surface, B in middle, C at bottom • B at surface, C in middle, A at bottom • C at surface, B in middle, A at bottom • A at surface, C in middle, B at bottom • C at surface, A in middle, B at bottom
A at surface, C in middle, B at bottom
The downward force exerted on a parcel of fluid or on an object immersed within a fluid is called: • Gravity • Density • Specific density • Buoyancy • Hydrostatic pressure
Gravity
Freshwater freezes at: • 0i C • 32i C • 4i C • -1.9i C
0i C
An object or water parcel rising in the water column has:
• Positive buoyancy
• Neutral buoyancy
• Negative buoyancy
Positive buoyancy
In temperate waters, the seasonal thermocline generally forms: • In the early winter • In the early spring • In the early summer • In the early fall
In the early spring
The waters above the thermocline are referred to as: • The pycnocline • The halocline • The nutricline • The mixed layer
The mixed layer
Which of the following units applies to density? • kg/m3 • kg/m2 • kg/m • ft/s • ft/s2
kg/m3
As the temperature of seawater increases, its density:
• Increases
• Decreases
• Stays the same
• Cannot be determined from the information given
Decreases
As the density of freshwater decreases, its buoyancy:
• Increases
• Decreases
• Stays the same
• Cannot be determined from the information given
…
Where abyssal waters meet upper ocean (surface + intermediate) waters, we find: • The seasonal thermocline • The permanent thermocline • The semi-permanent thermocline • The unseasonal thermocline
The permanent thermocline
A diver adjusts her buoyancy compensator so that she is neither rising nor sinking. She has achieved:
Neutral buoyancy
An object or water parcel rising in the water column has:
Positive buoyancy
Cooling of ocean surface waters in fall causes waters to become:
Negatively buoyant
If we enclose salt water in an airtight bottle and leave it there for 100 years, its density will:
Stay the same
The sun evaporates water from the surface of the tropical Pacific. The density of the surface waters will:
Increase
When the buoyant force on an object exceeds the force of gravity, the object:
Rises
If we heat sea water, its density
Decreases
When the buoyant force on a water parcel exceeds the force of gravity, the water parcel:
Rises
As the temperature of seawater decreases, its density:
Increases
True or false: Solid water is 10% more dense than liquid water.
False
The sun evaporates water from the surface of the tropical Pacific. The surface buoyancy will:
…
A hot air balloon stops rising at a particular altitude because:
The air surrounding the hot air balloon is the same density as the air inside the balloon.
An object or water parcel at rest in the water column has:
Neutral buoyancy
Sea ice melts in spring in the Arctic. The buoyancy of the surface waters will:
Increase
The process of formation of a seasonal thermocline which leads to layering of the water column is:
Stratification
Saltwater freezes at:
-1.9i C
The column of smoke billowing from the Huntington Beach electrical plant smokestacks levels off at a particular altitude because:
The air surrounding the column of smoke has the same density
As the salinity of seawater increases, its density:
Increases
A thermocline represents:
…
Warm air surrounded by cold air will cause the warm air to:
Rise
As the salinity of seawater decreases, its density:
Decreases
When the buoyant force on an object less than the force of gravity, the object:
Sinks
Cold air surrounded by warm air will cause the colder air to:
Sink
It rains for days at the equator. The density of the surface waters will:
Decrease
The cooling of surface waters and the breakdown of a seasonal thermocline is called:
Destratification
If we cool seawater, its density:
Increases
If we cool freshwater, its density:
Decreases
