Deep Ocean Currents: Driven by Density

What causes the motion of currents in the deep ocean?

• Tides

• Salinity

• Temperature and density differences

• Wind

Tags

NGSS.MS-ESS2-6

How deep is the layer where currents are driven by the wind?

• 5 kilometers

• 2.3 miles

• 300 meters

• 1 kilometer

Tags

NGSS.MS-ESS2-6

What is the average depth of the ocean?

• 3.7 kilometers

• 5 kilometers

• 1 kilometer

• 2.3 miles

What is density?

• The amount of matter in a certain space

• The temperature of water

• The color of water

• The weight of water

What is the Global Conveyor Belt?

• A type of ship

• A pattern of surface and deep-ocean currents

• A type of fishing net

• A type of ocean pollution

Tags

NGSS.MS-ESS2-6

What happens to the warm, salty water from the equator when it reaches the poles?

• It cools down and gets denser

• It becomes warmer

• It becomes less salty

• It evaporates

Tags

NGSS.MS-ESS2-6

Where does the dense, cold water from the North Atlantic sink to the bottom of the ocean?

• Indian Ocean

• Pacific Ocean

• Antarctica

• Arctic Ocean

Tags

NGSS.MS-ESS2-6

How long does it take for the water in the ocean to make a complete trip around the world?

• 5,000 years

• 1,000 years

• 500 years

• 100 years

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-4

What happens to the water that reaches the surface after its long trip around the world?

• It becomes warmer and rises to the surface

• It becomes denser and sinks

• It becomes less salty

• It evaporates

Tags

NGSS.MS-ESS2-4

What is the main factor that causes the water to sink to the bottom of the ocean in the North Atlantic?

• Temperature

• Tides

• Salinity

• Wind