Tides and Currents Flashcards
The difference between the high tide and the low tide is called the __________________.
Tidal Range
______________ is the vertical movement of water on the earth’s surface.
Tide
_________________ is the horizontal movement of water which accompanies the rising and falling of the tide.
Current
The incoming tide is called the _____________ tide, the outgoing is the _______________ current (tide).
flood,ebb
Gravity is one major force that creates tides. The dominant force is the ___________.
Moon
The gravitational attraction between the Earth and the moon is strongest on the side of the Earth that happens to be facing the moon. T or F
True
As the moon revolves around the Earth, its angle increases and decreases in relation to the equator. This is known as its _______________.
Declination
When is the sun at its minimal declination?
Vernal and Autumn equinoxes-March 21 and September 23.
It is positioned directly above the equator
When is the sun at its maximum declination?
Summer and winter solstices, June 21 and December 22.
Most coastal areas experience ______ high tides and ________ low tides every lunar day.
2,2
The lunar day is ____________ minutes longer than the solar day.
Coastal areas experience two high and two low every ________ hours and ___________ minutes.
50, 24H50M
High tides occur every _____ hours and ________ minutes apart. It takes _________ hours and __________ minutes for the water at shore to go from high to low, or from low to high.
12H,25M, six, 12.5 minutes
Spring tides result when the sun and moon are in alignment. T or F
True
When the moon is furthest from the Earth is is at _____________. When it is at its closest it is at ____________.
apogee, perigee
When the two highs and the two lows are about the same height, the pattern is called _________________.
semidiurnal tides
If they differ in height the pattern is called a mixed semi diurnal tide.
