Ocean Currents Quiz

What is thermohaline circulation primarily driven by?

• Temperature and salinity differences

• Wind patterns

• Earth's magnetic field

• Tidal forces

Which of the following factors does NOT affect the density of seawater?

• Temperature

• Salinity

• Depth

• Pollution

What is the main characteristic of warm water currents?

• They flow from the equator towards the poles

• They flow from the poles towards the equator

• They are denser than cold water currents

• They are less salty than cold water currents

What is the main characteristic of cold water currents?

• They flow from the equator towards the poles

• They flow from the poles towards the equator

• They are denser than warm water currents

• They are less salty than warm water currents

Why does water in the deep ocean move in the thermohaline circulation?

• Because of the wind

• Because of differences in water density

• Because of the Earth's rotation

• Because of solar heating

What happens to the density of seawater as it gets colder?

• It decreases

• It increases

• It stays the same

• It first increases, then decreases

Which of the following is NOT a factor in deep ocean circulation?

• Wind patterns

• Temperature

• Salinity

• Density differences

How do warm water currents affect the climate of coastal regions?

• They make the climate cooler

• They make the climate warmer

• They have no effect on the climate

• They make the climate drier

What is the effect of cold water currents on nearby land?

• They increase precipitation

• They decrease precipitation

• They make the climate warmer

• They have no effect on the climate

Why is the thermohaline circulation often referred to as the "global conveyor belt"?

• Because it moves water around the globe

• Because it is powered by mechanical engines

• Because it only affects the surface ocean

• Because it transports goods and animals