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test #3

what are resultant tidal forces produces by?

the difference between centripetal and gravitational forces

what is the reason that a lunar day is longer than ad solar day?

because the moon is also moving in its orbit around earth

a high tide is @3pm on a particular day.. on the very next day a high tide would most likely be expected at

3:50pm

which phase of the moon is associated with the smallest tidal range?

quarter moon

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

when does destructive interference between the solar and lunar tidal bulges occur?

neap tide

when does syzygy occur?

spring tides

true or false.. the gravitational force between 2 bodies is dependent on mass distance, with the distance being the greater influence of the two

true

true or false.. in a simple model of the tides as tidal bulges, the strongest gravitational influence = maximum seawater bulge = highest tide

true

true or false.. the best time to go collecting at a tide pool (when there would be the lowest low tides) is during neap tide conditions

false

when does the greatest tidal range on Earth occur?

during the times when the moon is at perigee and the sun is at perihelion

a tidal pattern with 2 nearly equal high tides and 2 nearly equal low tides per lunar day is called..?

a semidiurnal tidal pattern

a tidal pattern with one high tide and one low tide per lunar day is called a

diurnal tidal pattern

what tidal pattern occurs along the west coast of the united states?

mixed

under ideal conditions for the west coast for the U.S., the time interval between a high tide and the very next high tide would be..

12 hrs, 25 min

what would tides be like on earth if the moon did not exist?

tides would occur, but the tidal range would be reduced

in the open ocean, tidal currents follow which of the following patterns?

rotary

water that is flowing out of a bay as a result of a change in the tides is called

an ebb current

what is a tidal bore?

a true tidal wave caused by an incoming high tide that moves up certain rivers

which of the following statements about tidal power plants is false?

there are no existing tidal power plants anywhere in the world

the tides are considered an example of shallow-water waves because the tidal bulges have a wavelength that is on the order of

thousands of kilometers

of the following statements about the force of gravity between 2 bodies, which is/are true?

-the force of gravity between 2 bodies decreases as distance increases
-the force of gravity between 2 bodies increases with and increase in mass
-the force of gravity between 2 bodies is most affected by a change in distance

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
-on the side of earth facing away from the sun, a tidal bulge will form due to an excess of centripetal force
-tidal bulges are produced on both sides of earth from the moon and the sun

of the following statements about the tides which are true?

-although we observe the tides coming in and going out, in reality earth is rotating into and out of various tidal bulges, which produces changing tides
-the tides are caused by and imbalance between the centripetal force and the gravitational force of the moon and the sun
-there are 2 tidal bulges on earth caused by the moon: one facing the moon, and the other facing away from the moon
-both earth and the moon orbit around their common center of mass, called the barycenter

of the following statements about the location of the barycenter of the earth-moon system, which are true?

-it is located at the center of mass of the earth-moon system
-it is located at a point beneath earth's surface within the mantle

of the following statements about the contribution of the sun and the moon to earth's tides which are true?

-the lunar tidal bulges are about twice the size of the solar tidal bulges
-the moon exerts over twice the gravitational pull of the sun on earth's tides because of its proximity to earth
-the sun's contribution to the tides is less than that of the moon

0f the following statements about the monthly tidal cycle, which are true?

-the full moon is associated with spring tide conditions
-the full moon and the new moon affect the tides about the same
-neap tides occur twice a month
-spring tides occur twice a month

of the following statements about lunar phases, which are true?

-over the few days of a waxing gibbous moon, the tidal range increases
-over the few days of a waxing crescent moon, the tidal range decreases

of the following statements about tides in a simple tidal bulge model which are true?

-a lunar or solar eclipse can occur only when the moon is in syzygy
-tides are greatest when the moon is a perigee and earth is at perihelion
-neap tides result from destructive interference between the solar and lunar tidal bulges
-spring tides result from constructive interference between the solar and lunar tidal bulges

of the following statements about tidal patterns and tidal charts, which are true?

-the tidal range is the difference in height between a high tide and a low tide
-a mixed tidal pattern has 2 lows of unequal height and 2 highs of unequal height every tidal day
-a tidal day is 24 hrs and 50 min long
-a semidiurnal tidal pattern has 2 low tides every tidal day

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