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 weak 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) In general, high tides occur... a) each hour b) each month c) twice a day d) twice a month 5) What tide is this? a) Spring Tide b) Fall Tide c) Neap Tide d) Summer Tide 6) What tide is this? a) Fall Tide b) Neap Tide c) Summer Tide d) Spring Tide 7) What do we call the tide when the Sun, Earth , and Moon are all aligned? a) Spring tide b) Neap tide c) shallow tide d) Summer tide 8) What has a bigger effect on tides? a) The Sun's gravity b) The Moon's gravity 9) 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 10) Tides are caused by what force from the sun and moon? a) gravitational b) strong c) armed forces d) tidal force 11) 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 12) 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 13) Janis lives near the ocean. What observations can Janis make about the moon's phases that she can relate to the ocean's tides? a) that the moon phases effect high tides and low tides b) waxing and waning crescents affect the tides c) the moon does not affect the tides d) only new moon and full moon affect the tides 14) 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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