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Making Waves Comprehension
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A giant rotating pattern of currents in the ocean is a called _________.
Gyres
How are surface currents formed?
When wind blows over the surface of the ocean, it pushes against the water and creates currents.
True or False: Salinity is the amount of pepper in water.
False
Name one thing that causes currents deep underwater?
Changes in the temperatures and salinity of the water
What is upwelling?
Currents flow upward to the surface and bring important nutrients needed to sustain life.
Name a gyre teeming with animal life.
Sargasso Sea in the North Atlantic Gyre
Like whirlpools, the water in eddies moves with great __________________.
Velocity
What causes tides?
Tides are caused by the gravitational pull of the sun and moon on Earth's seawater.
True or False: An eddy is a circular current of water that runs in the opposite direction of the larger current.
True
True or False: When two currents come together in a narrow area, such as between two islands, the currents can speed up. This spinning pool of water is a whirlpool.
True
What happens to warm air and warm water?
They both rise
Name one way trash gets into the ocean
1. Dumped overboard from passing ships 2. Sewage and other hazardous waste is dropped from cruise ships 3. Trash is carried down rivers into the ocean