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The graph below shows changing ocean tide heights in feet (ft) on April 7 for a coastal location.

The next high tide will occur on April 8 at approximately*

Approximately which percentage of Earth’s surface is exposed above water?*

Base your answers to questions 3 on the graph below and on your knowledge of Earth science. 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 highest high tides and the lowest low tides occurred when the Moon was near*

The diagram below represents eight positions of the Moon in its orbit.

Why are high tides on Earth greatest when the Moon is in position A and in position E?*

The hydrosphere covers approximately what percentage of Earth’s lithosphere?*

The frequency of Earth’s cycle of ocean tides is primarily controlled by*

The graph below shows the change in the heights of tides for two days.

If this pattern continues, during the first six hours on Wednesday, tidal height will*

The graph below shows the tidal changes in ocean water level, in meters, recorded at a coastal location on a certain day.

Approximately how many hours apart were the two high tides?*

Ocean tides observed at coastal locations each day are primarily caused by*

The graph below shows ocean water levels for a shoreline location on Long Island, New York. The graph also indicates the dates and times of high and low tides.

Based on the data, the next high tide occurred at approximately*

Base your answers to questions 11 on the diagram in image provided, which represents eight positions of the Moon in its orbit around Earth.

Explain why the Moon’s gravity has a greater effect on Earth’s ocean tides than the Sun’s gravity. [1]*

Base your answers to questions 12 on the calendar and data table below. The calendar shows the month of February 2007, indicating the dates when some lunar phases occurred. February 24 lists only the name of the Moon phase that occurred on that day. The data table shows the highest and lowest tides (in feet) recorded for the Hudson River at Kingston, New York, over a 2-day period in February 2007.

On the grid in the image provided, plot the tide height for each time of day listed in the data table. Connect the plots with a line. [1]

*

Base your answers to questions 13 on the graph below and on your knowledge of Earth science. The graph shows the changes in ocean tide height at a New York State location during 1 day.

Determine the tide height and time of day for the lowest tide shown on the graph. Include a.m. or p.m. in your answer for the time of day. [1]

Tide height:

Time:*

Base your answers to questions 14 on the diagrams and tables below and on your knowledge of Earth science. Each diagram represents the Moon’s orbital position and each table lists times of high and low tides and tide heights, in meters, at New York City for the date shown.

Determine the length of time between the two high tides shown for May 13. [1]

____________ h ____________ min*

Base your answers to questions 15 on the diagram in image provided and on your knowledge of Earth science. The diagram represents the Sun’s apparent daily path for the first day of three seasons at 43° North latitude. The solid lines represent daytime paths as seen by an observer at this latitude. The dashed lines represent the nighttime paths that can not be seen by the observer.

On the diagram in the image provided, draw an X to represent the solar noon position of the Sun as seen by the observer on April 21. [1]