The video tutorial covers the concept of density currents and their role in ocean circulation, focusing on the global conveyor belt and thermohaline circulation. It explains how these currents connect the world's oceans and transport heat, impacting global climate. The tutorial also discusses the ocean's role in the carbon cycle and the issue of ocean acidification, highlighting the effects on marine life and ecosystems.

What is the primary characteristic of a density current?

• It is denser and sinks below the surface.

• It is driven by wind.

• It is warmer than surrounding water.

• It moves rapidly across the ocean.

What is the global conveyor belt primarily responsible for transporting?

• Sediments

• Salt

• Heat

• Nutrients

Which two factors primarily drive the thermohaline circulation?

• Temperature and salinity

• Wind and pressure

• Pressure and salinity

• Sunlight and wind

How does the Gulf Stream affect the climate of the British Isles?

• It makes the climate colder.

• It has no effect on the climate.

• It makes the climate drier.

• It warms the climate.

What is the main difference between maritime and continental climates?

• Maritime climates have more extreme temperatures.

• Continental climates are milder.

• Continental climates are influenced by the ocean.

• Maritime climates are influenced by the ocean.

How does water's ability to retain heat affect coastal climates?

• It causes more extreme temperature changes.

• It makes temperatures colder.

• It moderates temperature changes.

• It has no effect on temperature.

What role does the ocean play in the carbon cycle?

• It has no role in the carbon cycle.

• It only affects carbon on land.

• It stores carbon dioxide.

• It releases carbon dioxide into the atmosphere.

What is a consequence of increased carbon dioxide in the ocean?

• Ocean water becomes less salty.

• Ocean water temperature decreases.

• Ocean water becomes more acidic.

• Ocean water becomes more alkaline.

What is the impact of ocean acidification on coral reefs?

• Coral reefs dissolve.

• Coral reefs are unaffected.

• Coral reefs become more colorful.

• Coral reefs grow faster.

How do phytoplankton contribute to carbon storage in the ocean?

• They increase ocean acidity.

• They release carbon dioxide.

• They absorb carbon dioxide through photosynthesis.

• They have no effect on carbon storage.