NJIT Phys 203 Exam 3 UPDATED ACTUAL Questions and
CORRECT Answers
What percent of the Earth's water is ocean? 97%
Fathoms Measure ocean depth
Echo sounding Uses timing of echoes to determine depth
SONAR Sound Navigation And Ranging
Where is the deepest part of the ocean? Mariana Trench
, How much of the ocean floor has been mapped in 5%
detail?
Parts of ocean near continent Continental slope, shelf, and rise
What is an ocean basin Largest flattest surface
Seamounts Mountains close to the oceanic ridge; rocks are youngest
Table Mounts Flat top mountains
Abyssal Hills Closest to continent; oldest rocks
Active geological activity/margin West coast of SA, Continental Trench
Passive Margin Barely any activity
Type of rock on ocean floor Biogenic sedimentary rock
Most abundant salt in the ocean Sodium Chloride (NaCl)
Turbidity Currents Underwater landslide
Salinity of water The amount of salt in the water as a fraction of the total amount of water;
measured by salinometer
Amount of salinity in ocean 3 1/2 %
Brackish water kind of salty
Hypersaline water very salty
Seawater salt at average salinity
Limnological water very little water
Halocline steeply changing salinity
Isohaline constant salinity
Thermocline steeply changing temperature of water (equator)
Isothermal Cline constant temperature of water (poles)
Temperature + Salinity Density
Pycnocline steeply changing density
Isopycnal Cline Constant density
Euphotic zone near ocean surface where a lot of sunlight reaches
CORRECT Answers
What percent of the Earth's water is ocean? 97%
Fathoms Measure ocean depth
Echo sounding Uses timing of echoes to determine depth
SONAR Sound Navigation And Ranging
Where is the deepest part of the ocean? Mariana Trench
, How much of the ocean floor has been mapped in 5%
detail?
Parts of ocean near continent Continental slope, shelf, and rise
What is an ocean basin Largest flattest surface
Seamounts Mountains close to the oceanic ridge; rocks are youngest
Table Mounts Flat top mountains
Abyssal Hills Closest to continent; oldest rocks
Active geological activity/margin West coast of SA, Continental Trench
Passive Margin Barely any activity
Type of rock on ocean floor Biogenic sedimentary rock
Most abundant salt in the ocean Sodium Chloride (NaCl)
Turbidity Currents Underwater landslide
Salinity of water The amount of salt in the water as a fraction of the total amount of water;
measured by salinometer
Amount of salinity in ocean 3 1/2 %
Brackish water kind of salty
Hypersaline water very salty
Seawater salt at average salinity
Limnological water very little water
Halocline steeply changing salinity
Isohaline constant salinity
Thermocline steeply changing temperature of water (equator)
Isothermal Cline constant temperature of water (poles)
Temperature + Salinity Density
Pycnocline steeply changing density
Isopycnal Cline Constant density
Euphotic zone near ocean surface where a lot of sunlight reaches
