Tide Tables

Base your answer to the following question on the graph, which shows the water levels of ocean tides measured in Boston, Massachusetts, for a 2-day period. If the trends shown by the graph continue, which statement best describes the next low tide at Boston that is expected to occur on Wednesday?

• It will occur about 3 a.m. with a 0.4-meter water level.

• It will occur about 6 a.m. with a 0.6-meter water level

• It will occur about 9 p.m. with a 2.6-meter water level.

• It will occur about 10 p.m. with a 2.8-meter water level.

Base your answer to the following question on the graph below, which shows two days of tidal data from a coastal location in the northeastern United States. If the pattern shown continues, the most likely height and time for the first high tide on day 3 would be

• 2.2 meters at 4 a.m.

• 2.3 meters at 4 a.m.

• 2.2 meters at 5 a.m.

• 2.3 meters at 5 a.m.

An observer recorded the times of three successive high tides at one Earth location as:

• 7:12 a.m.

• 7:38 p.m.

• 8:04 a.m.

What was the time of the next high tide?

• 8:12 p.m.

• 8:30 p.m.

• 8:38 p.m.

• 9:04 p.m.

The diagram shows the Moon orbiting Earth, as viewed from space above Earth's North Pole. The Moon is shown at eight positions in its orbit. Spring ocean tides occur when the difference in height between high tide and low tide is greatest. At which two positions of the Moon will spring tides occur on Earth?

• 1 and 5

• 2 and 6

• 3 and 7

• 4 and 8

A high tide occurred at 6:00 a.m. at a beach on Long Island. The next high tide at this same beach would occur at approximately

• 12:15 p.m. on the same day

• 6:30 p.m. on the same day

• 12:45 p.m. on the following day

• 7:00 a.m. on the following day

A graph of tidal sea-level changes at a coastal city is shown in the diagram. The number of hours from one high tide to the next high tide is approximately

• 4 h

• 8 h

• 12 h

• 24 h

The graph shows the tidal range (the difference between the highest tide and the lowest tide) recorded in Minas Basin, Nova Scotia, during November 2007. The phase of the Moon on selected days is shown above the graph. The dates that the Moon was farthest from Earth (apogee) and closest to Earth (perigee) are indicated under the graph. The tidal range on November 8 was approximately

• 11 m

• 2 m

• 13 m

• 15 m

The highest high tides and the lowest low tides occurred when the Moon was near

• apogee and a new-Moon phase

• apogee and a full-Moon phase

• perigee and a new-Moon phase

• perigee and a full-Moon phase

The next first-quarter Moon after November 17 occurred closest to

• December 9

• December 14

• December 17

• December 24

The graph below shows ocean water levels for a shoreline location on Long Island, New York. The graph also indicated the dates and times of high and low tides. Based on the data, the next high tide occurred at approximately

• 4 p.m. on July 13

• 10 p.m. on July 13

• 4 p.m. on July 14

• 10 p.m. on July 14