1) What is the most dominant force that causes tides? a) strong winds that blow over ocean waters. b) the shifting of the plates on the ocean floor. c) the interaction of Earth, the moon and the sun. d) variations in the salinity of ocean water 2) What do we call the small tides that happen when the sun and moon are at right angles to each other? a) Neap Tide b) Spring Tide c) Little tide d) Small tide 3) Which of these causes tides? a) gravity b) rain c) wind d) ships 4) Semidiurnal tides occur... a) each hour b) each month c) twice a day d) twice a month 5) What is this arrangement called? a) Syzygy b) quadrature 6) What tide does this arrangement cause? a) Fall Tide b) Neap Tide c) Summer Tide d) Spring Tide 7) What has a bigger effect on tides? a) The Sun's gravity b) The Moon's gravity 8) As the moon revolves around the earth, the water follows the motion and causes... a) sea levels b) waves and currents c) high tides and low tides d) moon phases 9) Neap tides happen at _________ and _________ phases of the moon. a) first quarter and new moon b) last quarter and full moon c) waxing and waning d) 1st quarter and 3rd quarter 10) Which of the following greatly contribute to high tides? a) earth's gravitational pull on moon b) sun's gravitational pull on moon c) sun's gravitational pull on earth d) moon's gravitational pull on earth 11) Janis lives near the ocean. What observations can Janis make about diurnal tides? a) one low tide and one high tide per day b) two low tides and two high tides per day c) two low tides and two high tides per day of different heights 12) During a neap tide, the sun, moon, and earth are at a ___________ angle. a) 360 degree b) 45 degree c) 23.5 degree d) 90 degree

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