Ocean Currents: The Movement of Water Across Our Planet

The video explains the dynamics of ocean currents, both surface and deep. Surface currents, driven by winds, tides, and the Coriolis effect, move 10% of ocean water. Deep currents, part of thermohaline circulation, are driven by water density changes and the Coriolis effect. These currents connect globally, taking centuries to complete a circuit. Climate change may alter these currents, affecting marine ecosystems and weather patterns.

What percentage of ocean water is moved by surface currents?

• 20%

• 10%

• 5%

• 50%

Which of the following is NOT a factor that drives surface currents?

• Tides

• Winds

• Moon phases

• Coriolis effect

How does the Coriolis effect influence ocean currents?

• It has no effect on ocean currents.

• It moves currents towards the equator.

• It moves currents away from the equator towards the poles.

• It stops currents from moving.

What role does the shape of the coast play in ocean currents?

• It only affects tidal currents.

• It stops currents from moving.

• It has no effect on currents.

• It influences the direction and movement of currents.

What is thermohaline circulation?

• A process that stops ocean currents.

• A process that moves warm water from the poles to the equator.

• A process that moves warm water from the equator to the poles, where it cools and sinks.

• A process that only affects surface currents.

What happens to water as it moves towards the poles in thermohaline circulation?

• It evaporates.

• It becomes cooler, more saline, and denser.

• It remains unchanged.

• It becomes warmer and less dense.

How might climate change affect ocean currents?

• It will have no effect on ocean currents.

• It may cause ocean currents to stop completely.

• It will only affect surface currents.

• It could lead to changes in ocean currents, marine ecosystems, and weather patterns.

Which climate system might change in frequency and intensity due to warming oceans?

• The Antarctic Circumpolar Current

• The North Atlantic Drift

• The El Nino Southern Oscillation

• The Gulf Stream