CH 9 Test Your Knowledge Ch 9 10 Study Guide 1 Resultant tidal forces are produced by The difference between centripetal and gravitational forces 2 The reason that a lunar day is a solar day is that Longer than the Moon is also moving in its orbit around the Earth 3 A high tide is at 3 00 pm on a particular On the very next day a high tide would most likely be expected at 3 50 pm 4 Of the following phases of the Moon which one is associated with the smallest tidal range Quarter moon 5 Which of the following statements about the positions of the Earth Moon Sun system during a solar eclipse is FALSE Neap tide conditions are experienced 6 Destructive interference between the solar and lunar tidal bulges occurs during Neap tide 7 Syzygy occurs during Spring tides 8 The gravitational force between two bodies is dependent on mass and distance with distance being the greater influence of the two True 9 In a simple model of the tides as tidal bulges the strongest gravitational influence maximum seawater bulge highest tide True 10 The best time to go collecting at a tide pool when there would be the lowest low tides is during neap tide conditions False 11 The greatest tidal range on Earth occurs during the times when the Moon is at and the Sun is at Perigee perihelion 12 A tidal pattern with two nearly equal tides and two nearly equal low tides per lunar day is called a tidal pattern Semidiurnal 13 A tidal pattern with one high tide and one low tide per lunar day is called a tidal pattern Diurnal 14 What tidal pattern occurs along the West Coast of the United Sates Mixed 15 Under ideal conditions for the West Coast of the United States the time interval between a high tide and the very next high tide would be 12 hours 25 minutes 16 What would tides be like on Earth if the Moon did not exist Tides would occur the tidal rage would be reduced 17 In the open ocean tidal currents follow which of the following patterns Rotary Understand the Concepts 18 Water that is flowing out of a bay as a result of a change in the tides is called An ebb current 19 What is a tidal bore A true tidal wave caused by an incoming high tide that moves up certain rivers 20 Which of the following statements about tidal power plants is FALSE There are no existing tidal power plants anywhere in the world 1 Select the best ending to the following statement The tides are considered an example of shallow water waves because the tidal bulges have a wavelength this in on the order of Thousands of kilometers 2 Of the following statements about the force of gravity between two bodies which is are true The force of gravity between two bodies increases with an increase in mass The force of gravity between two bodies decreases as distance increases The force of gravity between two bodies is most affected by a change in distance 3 Of the following statements about forces and tidal bulges which is are true On the side of Earth closest to the Moon a tidal bulge will form as a result of an excess of gravitational force Tidal bulges are produced on both sides of the Earth from the Moon and the Sun On the side of Earth facing away from the Sun a tidal bulge will form due to an excess of centripetal force 4 Of the following statements about the tides which is are true There are two tidal bulges on Earth caused by the Moon one facing the Moon and the other away from the Moon Although we observe the tides coming in and going in reality earth is rotating into and out of various tidal bulges which produces changing tides Both Earth and the Moon orbit around their common center of mass called the barycenter The tides are caused by an imbalance between the centripetal force and the gravitational force of the Moon and the Sun 5 Of the following statements about the location of the barycenter of the Earth Moon system which is are true It is located at a point beneath Earth s surface within the mantle It is located at the center of mass of the Earth Moon system 6 Of the following statements about the contribution of the Sun and the Moon to Earth s tides which is are true The lunar tidal bulges are about twice the size of the solar tidal bulges The Sun s contribution to the tides is less that that of the Moon The Moon exerts over twice the gravitational pull of the Sun on Earth s tides because of it s proximity to Earth 7 Of the following statements about the monthly tidal cycle which is are true The full moon and the new moon affect the tides about the same The full moon is associated with spring tide conditions Spring tides occur twice a month Neap tides occur twice a month 8 Of the following statements about lunar phases which is are true Over the few days of a waxing crescent moon the tidal range decreases Over the few days of a waxing gibbous moon the tidal range increases 9 Of the following statements about tides in a simple tidal bulge model which is are true Tides are greatest when the Moon is at perigee and Earth is at perihelion Neap tides result from destructive interference between the solar and lunar bulges Spring tides result from constructive interference between the solar and lunar tidal bulges A lunar or solar eclipse can occur only when the Moon is in syzygy 10 Of the following statements about tidal patterns and tidal charts which is are true A mixed tidal pattern had two lows of unequal height and two highs of unequal height every tidal day The tidal range is the difference in height between a high tide and a low tide A semidiurnal tidal pattern has two low tides every day A tidal day is 24 hours and 50 minutes long Visualize Oceanography 1 2 Full moon D New moon B Solar tidal bulge A Lunar tidal bulge C Solar tidal bulges A First quarter moon D Lunar tidal bulges C Third or last quarter moon B 3 Waxing gibbous D Waning crescent C Waxing crescent B Waning gibbous A 4 Apogee A Perihelion B Aphelion D Perigee C 5 Area with diurnal pattern A Tidal period F Datum D Area with semidiurnal tidal pattern B Area with mixed tidal pattern C Tidal E 3 1 CH 10 Test Your knowledge In general the sand on most beaches comes from Rivers 2 Of the Following zones which one is defined as the portion of the shore that extends from the low tide breaker line Nearshore In a typical coastal region the berm is A dry nearly level or gently sloping platform 4 Normally beaches would have the greatest amount of sand on the berm near the end of Summer 5 During periods of …
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