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WorksheetsOcean Floor
Total questions: 15
Worksheet time: 8mins
A scientist is using sonar to map the ocean floor while traveling on the ocean surface in a ship. She observes that the first sound pulse returns from the ocean floor much more quickly than the second sound pulse. What can she conclude based on this information?
The water under the ship is becoming deeper as the ship travels.
The water under the ship is becoming less dense as the ship travels.
The water under the ship is becoming more dense as the ship travels.
The water under the ship is becoming more shallow as the ship travels.
The salinity of ocean water is not the same everywhere in the ocean. Which of the following is a cause of these differences in salinity?
changes in the density of ocean water
high evaporation rates at the ocean’s surface
dumping of salt into ocean water near coastal cities
extraction of ocean water for desalination by coastal nations
Many large bodies of water, such as the global ocean, have a layer called a thermocline. The graph below shows how temperature changes with depth in the ocean.
Between which two points on the graph is the thermocline?
points I and II
points II and III
points III and IV
points IV and V
Which pair of factors determines the density of ocean water?
salinity and latitude
latitude and longitude
salinity and temperature
longitude and temperature
______ is the amount of salt dissolved in the water.
Temperature
Density
Salinity
None
_____ refers how warm or cold is the water is
Temperature
Density
Salinity
None
Which of the following statements about the extent of Earth’s global ocean is correct?
It covers about half as much of Earth’s surface as land covers.
It covers about the same amount of Earth’s surface as land covers.
It covers more than twice as much of Earth’s surface as land covers.
It covers more than three times as much of Earth’s surface as land covers
_____ refers to the mass of the water determined by salinity and temperature.
Temperatur
Density
Salinity
None
Scientist have been able to map the ocean floor using sound waves
Satellites
Sonar
Deep Sea Drilling
Underwater Vessels
Scientist use these objects orbiting in space to capture detailed images of the ocean floor.
Satellites
Sonar
Deep Sea Drilling
Underwater Vessels
Which letter shows the Continental margin?
A
B
C
D
The deepest part of the ocean
Deep Ocean Basin
Continental Margins
The great drop off
Both B and C
Scientist are able to collect core samples of the ocean floor to study its makeup.
Satellites
Sonar
Deep Sea Drilling
Underwater Vessels
Scientist use these unmanned subs to help map the ocean floor.
Satellites
Sonar
Deep Sea Drilling
Underwater Vessels
The edge of the continent that is covered
Deep Ocean Basin
Continental Margins
The great drop off
Both A and C
