Quiz 12 Review

Question 1

It rains for days at the equator. The buoyancy of the surface waters:
• Increase
• Decrease
• Stay the same

Answer 1

Increase

Question 2

The upward force exerted on a parcel of fluid or on an object immersed within a fluid is called:

Answer 2

Buoyancy

Question 3

The amount of matter that occupies a given volume of space defines its:
• Density
• Volume
• Area
• Mass
• Physical state

Answer 3

Density

Question 4

An imaginary column of water from the ocean surface to depth is referred to as the:
• Mixed layer
• Thermocline
• Pycnocline
• Water column

Answer 4

Water column

Question 5

The two principal controls on sea water salinity are:
• Evaporation and precipitation
• Surface heating and evaporation
• Runoff and river flow

Answer 5

Evaporation and precipitation

Question 6

The density of freshwater reaches a maximum at:
• 0i C
• 32i C
• 4i C
• -1.9i C

Answer 6

4i C

Question 7

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

Answer 7

Positive buoyancy

Question 8

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

Answer 8

A at surface, C in middle, B at bottom

Question 9

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

Answer 9

Gravity

Question 10

Freshwater freezes at:
• 0i C
• 32i C
• 4i C
• -1.9i C

Answer 10

0i C

Question 11

An object or water parcel rising in the water column has:
• Positive buoyancy
• Neutral buoyancy
• Negative buoyancy

Answer 11

Positive buoyancy

Question 12

In temperate waters, the seasonal thermocline generally forms:
• In the early winter
• In the early spring
• In the early summer
• In the early fall

Answer 12

In the early spring

Question 13

The waters above the thermocline are referred to as:
• The pycnocline
• The halocline
• The nutricline
• The mixed layer

Answer 13

The mixed layer

Question 14

Which of the following units applies to density?
• kg/m3
• kg/m2
• kg/m
• ft/s
• ft/s2

Answer 14

kg/m3

Question 15

As the temperature of seawater increases, its density:
• Increases
• Decreases
• Stays the same
• Cannot be determined from the information given

Answer 15

Decreases

Question 16

As the density of freshwater decreases, its buoyancy:
• Increases
• Decreases
• Stays the same
• Cannot be determined from the information given

Answer 16

…

Question 17

Where abyssal waters meet upper ocean (surface + intermediate) waters, we find:
• The seasonal thermocline
• The permanent thermocline
• The semi-permanent thermocline
• The unseasonal thermocline

Answer 17

The permanent thermocline

Question 18

A diver adjusts her buoyancy compensator so that she is neither rising nor sinking. She has achieved:

Answer 18

Neutral buoyancy

Question 19

An object or water parcel rising in the water column has:

Answer 19

Positive buoyancy

Question 20

Cooling of ocean surface waters in fall causes waters to become:

Answer 20

Negatively buoyant

Question 21

If we enclose salt water in an airtight bottle and leave it there for 100 years, its density will:

Answer 21

Stay the same

Question 22

The sun evaporates water from the surface of the tropical Pacific. The density of the surface waters will:

Answer 22

Increase

Question 23

When the buoyant force on an object exceeds the force of gravity, the object:

Answer 23

Rises

Question 24

If we heat sea water, its density

Answer 24

Decreases

Question 25

When the buoyant force on a water parcel exceeds the force of gravity, the water parcel:

Answer 25

Rises

Question 26

As the temperature of seawater decreases, its density:

Answer 26

Increases

Question 27

True or false: Solid water is 10% more dense than liquid water.

Answer 27

False

Question 28

The sun evaporates water from the surface of the tropical Pacific. The surface buoyancy will:

Answer 28

…

Question 29

A hot air balloon stops rising at a particular altitude because:

Answer 29

The air surrounding the hot air balloon is the same density as the air inside the balloon.

Question 30

An object or water parcel at rest in the water column has:

Answer 30

Neutral buoyancy

Question 31

Sea ice melts in spring in the Arctic. The buoyancy of the surface waters will:

Answer 31

Increase

Question 32

The process of formation of a seasonal thermocline which leads to layering of the water column is:

Answer 32

Stratification

Question 33

Saltwater freezes at:

Answer 33

-1.9i C

Question 34

The column of smoke billowing from the Huntington Beach electrical plant smokestacks levels off at a particular altitude because:

Answer 34

The air surrounding the column of smoke has the same density

Question 35

As the salinity of seawater increases, its density:

Answer 35

Increases

Question 36

A thermocline represents:

Answer 36

…

Question 37

Warm air surrounded by cold air will cause the warm air to:

Answer 37

Rise

Question 38

As the salinity of seawater decreases, its density:

Answer 38

Decreases

Question 39

When the buoyant force on an object less than the force of gravity, the object:

Answer 39

Sinks

Question 40

Cold air surrounded by warm air will cause the colder air to:

Answer 40

Sink

Question 41

It rains for days at the equator. The density of the surface waters will:

Answer 41

Decrease

Question 42

The cooling of surface waters and the breakdown of a seasonal thermocline is called:

Answer 42

Destratification

Question 43

If we cool seawater, its density:

Answer 43

Increases

Question 44

If we cool freshwater, its density:

Answer 44

Decreases