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Worksheets2.3 Ocean Currents Review
Total questions: 13
Worksheet time: 7mins
What conclusion about Earth’s surface currents could someone draw by looking at Cindi’s map?
Surface currents in the Eastern Hemisphere flow in a counterclockwise direction.
Surface currents in the Western Hemisphere flow in a counterclockwise direction.
Surface currents in the Southern Hemisphere flow in a counterclockwise direction.
Surface currents in the Northern Hemisphere flow in a counterclockwise direction.
Josefina is working on a computer model of upwelling. She draws an arrow to represent the movement of water. What should she draw to represent the cause of upwelling?
a figure of the sun
an arrow representing wind
labels indicating temperature
arrows showing surface currents
What role does heat play in the formation of convection currents?
When water loses heat, it becomes denser and sinks.
When water gains heat, it becomes denser and sinks.
When water loses heat to cooler water, the cooler water becomes denser and sinks.
When water gains heat, it dissolves more solids and gases, becomes denser, and sinks.
Which of the following can cause an increase in density that results in a deep ocean current?
The sun heats the water’s surface.
A warm wind blows across cold water.
An iceberg melts, adding fresh water to ocean water.
Warm water loses energy to its surroundings and cools.
Which of the following movements of ocean water has the greatest direct effect on the growth of producers?
upwelling
deep current
surface current
convection current
Which of the following best describes the movement of heat energy in the global ocean?
Heat energy is transported to the equator from the continents.
Heat energy in deep currents is transported to the ocean’s surface.
Heat energy in warm surface currents is transported to areas near Earth’s poles
Heat energy is transported from areas of lower temperature to areas of higher temperature.
Which of the following correctly shows the chain of energy transfers that create surface currents on the ocean?
solar energy —> wind energy —> surface currents
wind energy —> solar energy —> surface currents
tidal energy —> wind energy —> surface currents
geothermal energy —> wind energy —> surface currents
What factor causes surface currents north and south of the equator to move in different directions?
the sun’s energy
the Coriolis effect
the density of water
continental deflection
Which type of current occurs when surface water on the ocean becomes denser than the water below it and sinks?
Coriolis current
deep current
surface current
upwelling
A deep ocean current forms when ocean water becomes denser and sinks. The following figure shows a deep ocean current. Based on the illustration, which of the following statements describes the relationship between density and temperature?
Cold water is denser than warm water.
Warm water is denser than cold water.
Warm and cold water have equal densities.
The density of water is not affected by temperature.
Which three factors most directly affect surface currents in the oceans?
upwelling, convection, and the sun’s energy
deep currents, convection currents, and surface winds
dissolved solids, dissolved gases, and the sun’s energy
surface winds, the Coriolis effect, and continental deflection
What causes convection currents to form in the oceans?
surface winds
the Coriolis effect
continental deflection
differences in water density
How does convection cause ocean currents?
During the process of convection, energy is transferred to the atmosphere, forming winds. These winds power surface currents.
During the process of convection, the heating of surface water by the sun results in upwelling.
During the process of convection, energy in warm water is lost to its surroundings. The water cools, becomes denser, and sinks.
During the process of convection, more minerals and gases dissolve in warm water. This increases the density of the warm water and causes it to sink
