Ocean Currents Review

What type of environmental study do drift cards facilitate?

• Limited environmental study

• Broad environmental study

• Focused environmental study

• No environmental study

What drives the ocean conveyor belt?

• Wind patterns

• Temperature and salinity differences

• Earth's rotation

• Tidal forces

What is the direction of the flow created by sinking cold, salty water in the Norwegian Sea?

• North towards the Arctic

• East towards Europe

• South towards Antarctica

• West towards America

Which type of flow is represented by the red arrows in the diagram?

• Cool subsurface flow

• Warm surface flow

• Deep ocean flow

• Tidal flow

Which type of flow is represented by the blue arrows in the diagram?

• Warm surface flow

• Cool subsurface flow

• Tidal flow

• Surface wind flow

Which continent is located to the east of the Atlantic Ocean in the diagram?

• Africa

• South America

• Australia

• North America

What is the significance of warm surface flow in thermohaline circulation?

• It cools the ocean surface

• It transports warm water to polar regions

• It increases ocean salinity

• It causes ocean currents to slow down

What effect does upwelling have on marine life?

• Decreases productivity

• Increases productivity and abundance

• Causes marine life to migrate

• Reduces marine biodiversity

What happens to the easterly winds during an El Niño year?

• They strengthen

• They weaken

• They reverse direction

• They disappear

What effect does El Niño have on the winter in some regions?

• Colder winter

• Warmer winter

• No change

• Longer winter