# Name Pd tidal waves

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```					Name: _______________________________________________ Pd.: ________ Date: ______________________

Tides and Waves Notes

Tides                               ______________ Tides are _______________ and
 The rise and fall in sea level is called a _____________.       _____________ Tides are ________________ than
 Caused by a giant ______________.                               normal
 One low-tide/high-tide cycle takes about _____ hrs and       Occurs during the _______________ and
_____ min.                                                     _______________ quarters.
 Tides are caused mainly by the gravitational pull of the     Earth, Moon, and Sun form _______________ angles
______________.                                            Gravitational Effect of the Moon
Other Things That Influence Tides                              Two big bulges of water form on the Earth:
 The gravitational pull of the _____________.                     one directly under the moon
 The ___________________ of the sun and the moon                  another on the exact opposite side
from earth.                                                   As the Earth spins, the bulges follow the moon.
 _______________ and other factors.
 Tides tend to be ______________ where the
gravitational force between the earth and the moon
are the ___________________, along with the
__________________ side of the earth where the
centrifugal force is strongest.
Tidal Range – The ____________________ in ocean level
between high tide and low tide is called the tidal range
What is the Tidal Range?
 HT = 30 ft         LT = 20 ft      Tidal Range =
____________
 HT = 20 ft         LT = 12 ft      Tidal Range =
____________
 HT = 50 ft         LT = 20 ft      Tidal Range =
Waves
____________
 A Wave is a rhythmic movement that carries
Spring Tides
________________ through matter or space.
 Spring Tides have the __________________ range
 In oceans, waves move through seawater
______________ Tides are ________________ and
 Caused by:
_____________ Tides are _______________ than normal
________________
 Occurs during the __________ and _________ moons.
______________________
 Earth, Moon, and Sun are _______________ ________
Gravitational force of the ___________ and _______
Neap Tides
Waves On The Beach
 Neap Tides have the _______________ amount of
 Most of the waves we see are at the beach.
range.
 As the wave travels in shallower water it slows and
eventually falls forward as a _________________.
Wind or Storm Waves                                     Wave Movement
 The most familiar waves are ____________ generated.    When a wave passes through the ocean, individual
Three things determine how large these waves can           water molecules move _______ and _________ but
become.                                                    they do not move _________________ or
1. ______________ _______________                          _________________.
- This is the speed that the wind is blowing.         When a wave breaks against the shore, the
- This is usually measured in knots or nautical         _______________ outruns the _______________ and
miles per hour.                                         the crest ___________________ - Called a
2. __________________                                      _________________.
- Refers to the ______________ over which the            In this case, water does move forward and
wind blows.                                          backward.
- Winds in some areas may blow strong for long       Waves Caused by Wind
periods of time which can produce ______________      When wind blows across a body of water,
waves.                                              __________________ causes the water to move along
3. _______________                                         with the wind.
- Refers to the __________________ over which the    Tsunamis
wind blows.                                           Tsunamis were once called Tidal waves, but they have
- If a wind blows over thousands of miles, the          _________________ to do with the tides.
waves can get much ________________ than              They are produced by _____________________ and
blowing across a small pond.                            other seismic disturbances. That’s why they’re also
Parts of a Wave                                            called seismic sea waves.
 _______________– highest point of a wave               They are very __________, __________ moving waves.
 ________________ – lowest point of a wave              They can have wavelengths of ________ miles.
 ______________ ________________ – vertical             They can travel at over ________ miles per hour! As
distance between the crest and the trough               fast as a jet!
 _____________________ – horizontal distance            The Danger of Tsunamis
between two crests or two troughs                        In the open ocean, a tsunami may only have a wave
height of a _____________ feet.
As the wave approaches shallow water, it builds to
heights that can reach greater than ________
feet.
Undertow-

Rip current-

Longshore current-

```
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 views: 8 posted: 3/18/2011 language: Norwegian pages: 2