Ocean Currents and Marine Pollution

What is a primary characteristic of the North Pacific Garbage Patch?

• A large, solid island of floating trash.

• A series of trash vortices primarily composed of microplastics.

• A stationary collection of large debris like grocery bags and drinking straws.

• An area of ocean that is easily defined and always remains in one location.

What two main factors drive ocean currents?

• Moon phases and tidal forces.

• Differences in density and pressure.

• Underwater volcanic activity and seismic shifts.

• Marine life migration patterns and feeding habits.

How does temperature affect the density of ocean water?

• Warm water is denser than cold water.

• Cold water is less dense than warm water.

• Warm water is less dense than cold water.

• Temperature has no effect on water density.

What happens to the Coriolis effect at the equator?

• It is at its strongest, causing significant deflection.

• It causes currents to flow in a clockwise direction.

• It is basically non-existent, allowing water to flow in a straight direction.

• It causes currents to break up into small eddies.

Are you enjoying the video lesson?

• Yes

• No

What is the primary reason for the formation of large garbage patches in the ocean?

• Deep currents push all debris to the ocean floor where it accumulates.

• Strong equatorial currents break down plastic into large, visible pieces.

• Ocean gyres, formed by circulating currents, trap and accumulate marine debris.

• Upwelling brings debris from the ocean floor to the surface, forming patches.

How do warm and cold ocean currents generally affect the climate of continental coastlines?

• Warm currents bring warmth and humidity to East coasts, while cold currents moderate temperatures and dry West coasts.

• Warm currents bring cold and dry conditions to East coasts, while cold currents bring warmth and humidity to West coasts.

• Both warm and cold currents bring warmth and humidity to all coastlines.

• Both warm and cold currents have a drying effect on all coastlines.

Which statement accurately describes deep ocean currents?

• They travel at faster speeds than surface currents and complete a circuit in a few years.

• They are primarily driven by wind and move ocean waters only horizontally.

• They are critical for moving nutrients and oxygen throughout the ocean, acting like a global conveyor belt.

• They only flow from low pressure to high pressure, preventing vertical movement of water.

Which of the following is a significant source of marine pollution that contributes to nonpoint source pollution?

• Intentional dumping of industrial waste directly into the ocean by factories.

• Plastic debris from land-based sources and items lost from cargo ships.

• Natural decomposition of marine organisms on the ocean floor.

• Volcanic eruptions releasing ash and gases into the ocean.