Quiz 2.3 Tides and Currents

Upwelling currents bring water to the surface that is ..... (You must choose the TWO correct answers)

• warm
• cold
• rich in nutrients
• rich in oxygen

Which shows a normal year in the Pacific Ocean?

• Map A
• Map B

What causes the downwelling in the Northern Atlantic Ocean?

• strong winds from the Arctic Ocean
• salty water becoming very cold and dense in the Northern Atlantic
• extra strong tradewinds
• the delivery of warm water by the Gulf Stream

During an El Nino year, the tradewinds

• are weaker
• are stronger
• don't change

Which of the following is true?

• Currents traveling from the equator carry a lot of heat energy towards the poles.
• Currents traveling from the equator carry a lot of nutrients towards the poles.
• Currents traveling from the equator carry a lot of oxygen towards the poles.

Coriolis Effect affects surface currents by

• making them warmer
• deflecting them left or right
• forcing them downwards
• making them faster

True or False: The westward directions of the tradewinds above and below the equator switch directions seasonally.

• False
• True

During an El Nino year, the upwelling off of western South America

• is weaker
• is stronger
• is colder
• doesn't change

When would you expect seabirds along the coast of Ecuador/Peru/Galapagos to have mass die-offs due to a lack of food (fish)?

• during a normal year
• during an El Nino year
• during a La Nina year

During which year would you expect the strongest drought conditions in western Mexico?

• during a normal year
• during an El Nino year
• during a La Nina year