Currents
Waves
Tides
Vocabulary
Gyres

100

What causes surface currents?
Wind

100

Ocean waves are what type of wave?
Orbital

100

What is a tide?
Daily variation in sea level at a shoreline which varies by location

100

The constant motion of the ocean that is responsible for distributing heat throughout the world is known as what?
Ocean Conveyor Belt

100

What is an ocean gyre?
A large circular pattern of ocean movement caused by the meeting up of several currents

200

What are the doldrums and where are they located?
Regions of calm ocean currents and winds within the horse latitudes

200

How is wave speed calculated?
It is calculated by dividing the wavelength by the period of a wave.

200

What is Equilibrium Theory and who created it?
Theory that describes the driving factor of tides as two tidal bulges caused by the gravitational pull of the Moon and Sun on Earth created by Isaac Newton

200

What is the term for the depth in the ocean at which the wind is no longer strong enough to influence the water’s motion?
Friction Depth

200

How many major world gyres are there?
5

300

What causes deep ocean circulation?
Differences in water mass density (thermohaline circulation)

300

What are the 3 important parts of a wave?
Crest, Trough, and Wavelength

300

The Bay of Fundy in Canada is an example of a location where what occurs?
Extreme Tides

300

Ekman transport moves seawater about ____ to the right in the _________ Hemisphere.
90 degrees, Northern

300

What direction do gyres move in the northern hemisphere?
Right / Clockwise

400

Describe three characteristics of a western boundary current.
Warm temperature, high volume, fast current, flowing toward a pole

400

A _______ is the occurrence of water in a lake or bay rocking back and forth and “sloshing” from one shore to another as a result of an earthquake or strong winds
Seiche

400

A _______ _______ is when the ocean is pulled into huge waves with a wavelength the size of the entire ocean basin.
Tidal Bulge

400

What is a geostrophic current?
A current caused by the Earth’s rotation

400

Name the major world gyres.
North Atlantic, South Atlantic, North Pacific, South Pacific, and Indian

500

How does ocean circulation effect world climate?
Ocean circulation is responsible for moving heat throughout the world and therefore determines climate.

500

What are disturbing forces?
Forces that create waves such as wind or seismic activity

500

The Dynamic Theory of Tides takes into account that there are actually more than two tidal bulges and that tides are affected by what other factors?
Imperfect shape of the Earth, seasons, the shape of the ocean basins, & the Coriolis Effect

500

What causes downwelling and why is it beneficial?
It occurs when water is pushed against a coastline, forcing surface water to sink down. Downwelling is a key component to keeping the ocean oxygenated.

500

Name the 3 major currents in the North Atlantic Gyre.
Gulf Stream, Canary Current, and the N. Equatorial Current