Aquatics CH 9 Note Questions

What is the percentage of surface current?

• 5%

• 10%

• 15%

• 20%

Thermohaline currents are: A) Slow deep currents that affect vast bulk of seawater beneath the pycnocline B) Fast surface currents C) Currents caused by wind D) Tidal currents.

• Slow deep currents that affect vast bulk of seawater beneath the pycnocline

• Fast surface currents

• Currents caused by wind

• Tidal currents

Nora and Scarlett are planning a project on renewable energy sources. They want to focus on the area where most of Earth's surface wind energy is concentrated. Which area should they choose? A) Trade winds B) Easterlies and Westerlies C) Polar winds D) Monsoon winds.

• Trade winds

• Easterlies and Westerlies

• Polar winds

• Monsoon winds

Continent and basin topography often block continuous flow and cause water to move in a:

• Linear pattern

• Circular pattern

• Zigzag pattern

• Random pattern

A gyre is a:

• Linear flow

• Circular flow, flows periphery of an ocean basin

• Zigzag flow

• Random flow

Ekman transport: net motion of water down roughly 100 Meters. Theory 90 degrees right of wind direction in Northern Hemisphere & 90 degrees left in the Southern Hemisphere. True or False?

• True

• False

List the 5 geostrophic gyres: A) Northern Atlantic gyre, Southern Atlantic gyre, Northern Pacific gyre, Southern Pacific gyre, & Indian Ocean gyre B) Arctic gyre, Antarctic gyre, Equatorial gyre, Tropical gyre, & Subtropical gyre.

• Northern Atlantic gyre, Southern Atlantic gyre, Northern Pacific gyre, Southern Pacific gyre, & Indian Ocean gyre

• Arctic gyre, Antarctic gyre, Equatorial gyre, Tropical gyre, & Subtropical gyre

How do Eastern boundary currents differ from Western boundary currents?

• Carry warm water poleward, deep and narrow, with eddies

• Carry cold water equatorward, shallow and broad, no eddie

• Flow east to west, linking Eastern & western currents

• Increase in speed of geostrophic currents.

Transverse currents flow in which directions?

• North to south

• East to west, west to east

• South to north

• Only east to west

How does La Nina affect the ocean? When does it happen?

• Warmer-than-normal and occurs usually at the end of El Nino

• Colder-than-normal and occurs usually at the end of El Nino

• No change in temperature

• Warmer-than-normal and occurs usually at the beginning of El Nino