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Global Circulation and Climate Patterns
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Grade Level
Grade 6
6.21 Global Circulation and Climate Patterns
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A report says the Atlantic Meridional Overturning Circulation (AMOC) would weaken if large amounts of freshwater enter the North Atlantic. Which statement best explains the physical reason?
A
Freshwater is denser than saltwater, so it sinks faster.
B
Freshwater makes surface water less dense, reducing sinking and weakening the deep-water formation that drives part of the circulation.
C
Freshwater increases Earth’s rotation rate.
D
Freshwater blocks sunlight from reaching the tropics.
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