OCE1001 Exam 3 Chapter 9 1 The barycenter follows a smooth orbit around the Sun 2 A lunar day is shorter than a solar day True False True 3 There is no horizontal tide generating force on Earth at points directly below and opposite the Moon 4 The center of mass of the Earth Moon system is called the a barycenter b perigee c aphelion d apogee e perihelion 5 The difference between centripetal forces and gravitational forces is called the a diurnal force b dynamic foce c resultant force d tidal force e solar force 6 The tide generating force varies a directly with the square of the distance between the objects b directly with the cube of the distance between the objects c directly with the square of the distances of the objects divided by the product of the masses d inversely with the square of the distance between the objects e inversely with the cube of the distance between the objects 7 Tidal forces cause deformation of our planet because a the gravitational attraction between Earth and the Moon is greater than the attraction between Earth and the Sun b the supplied gravitational forces at various points within the planet differ from the centripetal force required to maintain the orbital relationship between the Sun Earth and Moon c the velocity with which the Moon orbits Earth is greater than the velocity of Earth orbiting the Sun d the materials of Earth are denser nearer the equator than nearer the poles e the centripetal force required to maintain the orbital relationship between the Moon and Earth is greater than the gravitational forces between them 8 Measurable tidal bulges occur in a the ocean and Earth s crust only b the ocean the atmosphere and Earth s crust c the ocean and the atmosphere only d the ocean only e any body of water regardless of size 9 Of the following statements about the force of gravity between two bodies which is are true a The force of gravity between two bodies decreases as distance increases b The force of gravity between two bodies decreases with an increase in mass c The force of gravity between two bodies is most affected by a change in distance d The force of gravity between two bodies is most affected by a change in mass e The force of gravity between two bodies increases with an increase in mass f The force of gravity between two bodies increases as distance increases 10 Of the following statements about the tides which is are true a Both Earth and the Moon orbit around their common center of mass called the barycenter b The Sun because of its larger size has more effect on Earth s tides c The tides are caused by an imbalance between the centripetal force and the gravitational force of the Moon and the Sun d There are two tidal bulges on Earth caused by the Moon one facing the Moon and the other facing away from the Moon e 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 11 Of the following statements about the location of the barycenter of the Earth Moon system which is are true a It is located at the exact center of Earth b It is located at a point beneath Earth s surface within the mantle c It is located in space between the Sun and the Earth Moon system d It is located in space between Earth and the Moon but closer to Earth e It is located at the center of mass of the Earth Moon system f It is located in space exactly halfway between Earth and the Moon 12 Of the following statements about the contribution of the Sun and the Moon to Earth s tides which is are true a he Moon exerts over twice the gravitational pull of the Sun on Earth s tides because of its proximity to Earth b The Sun exerts over twice the gravitational pull of the Moon on Earth s tides because of its massive size c The Sun s contribution to the tides is less than that of the Moon d The solar tidal bulges are about twice the size of the lunar tidal bulges e The Moon s contribution to the tides is less than that of the Sun f The lunar tidal bulges are about twice the size of the solar tidal bulges 13 A spring tide occurs once per month 14 Syzygy produces maximum tides once every 1 600 years if the relative positions of the Sun to the Earth and the Moon to the Earth are just right 15 Tidal ranges are much greater during apogee than perigee False True False 16 Compared with a solar day a lunar day is a equal to a solar day b shorter than a solar day c longer than a solar day d twice the length of a solar day e half the length of a solar day 17 The vertical difference between consecutive high and low tides is called the a ebb tide b tidal range c tidal height d tidal bore e ood tide 18 A neap tide has a moderately high tidal range b very low tidal range c no tidal range d very high tidal range e moderately low tidal range 19 The angular distance of the Sun or the Moon above or below the Earth s equatorial plane is called the a ecliptic b syzygy c apogee d declination e perihelion 20 When the Earth is at its greatest distance from the sun it is said to be at a proxigean b perigee c perihelion d aphelion e apogee 21 A proxigean tide occurs when a there is a waxing gibbous Moon and the Sun is at aphelion b the Moon is at quadrature and perigee at the same time c the Moon is at perigee at a time of syzygy d the Moon is full and there is a neap tide e the Moon is at apogee and its declination is zero 22 Of the following statements about forces and tidal bulges which is are true a Tidal bulges are produced on both sides of Earth from the Moon and the Sun b On the side of Earth facing away from the Sun a tidal bulge will form due to an excess of centripetal force c On the side of Earth closest to the Moon a tidal bulge will form as a result of an excess of gravitational force d On the side of Earth facing away from the Sun a tidal bulge will form as a result of an excess of gravitational force e Tidal bulges are produced only on the side of Earth closest to either the Moon or the Sun f On the side of Earth closest to the Moon a tidal bulge will form as a result of an excess of centripetal force 23 Of the following statements about the monthly tidal cycle which is are true a The new moon is associated with …
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