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Oceans
25 cards·by Keonalee@delmarpines.com
What is the vertical distance between trough and crest?
Wave Height
Where do most ocean waves obtain their energy?
The wind
What is the horizontal distance between 2 successive crests/ troughs?
Wavelength
What is one wavelength called?
Wave period
What is the distance across open water?
A fetch
What happens as the waves touch the bottom?
The wave speed decreases
What does a decrease in wave speed result in?
A decrease in wavelength and an increase in wave height
How often do tides change?
Tides change constantly
How many tidal patterns are there?
3
What are the 3 tidal patterns
Diurnal tides, semidiurnal tides, and mixed tides
How much of Earth’s surface do the oceans make up?
3/4 of the Earth
What are three types of ocean currents?
Surface currents, deep currents, and mid-depth currents
What do currents do for the ocean and the Earth?
Control temp, move nutrients, knows where oil will move, move objects to depths of 100 ft, and
they move ocean floors itself
Why do we know so little about ocean life, and why is it so difficult for humans to explore
oceans?
Because the pressure, and cold are more than people can withstand
How does the moon affect the tides?
As the moon rotates around the earth, the tides become higher where the moon is pulling at the
tides and also on the opposite sides.
What is bycatch?
Bycatch - animals caught accidently
What are some fish species that are being overfished?
Tuna, swordfish, marlin
What does circular orbital motion allow?
It allows energy to move forward through the water while the individual water particles that
transmit the waves to move around in a circle
What are tides?
Tides are daily changes in the elevation of the ocean surface.
What is tidal range?
Tidal Range is the difference in height between successive high tide
What are spring tides?
Spring Tides are tides that have the greatest tidal range due to the alignment of the
Earth-moon-sun system.
What are neap tides?
Neap Tides are tides that have the lowest tidal range, occurring near the times of the
first-quarter and third-quarter phases of the moon.
What are diurnal tides?
Diurnal tides are a tide in which there is only one high water and one low water each lunar day.
What are horizontal movements of water that are caused by wind and occur at or near the ocean's
surface?
Surface currents
Name 3 factors that control surface currents.
Global winds, the corolis affect, and continental deflections