# Tide Exercise

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```					Tide Exercise

In this activity you will be using the Harbor Master software on the computer to collect
data. (If you do this activity independently similar data can be collected at the following
web site: http://tbone.biol.sc.edu/tide/sitesel.html.)

Part A: Boston Harbor

In the Harbor Master software open the tidal data for Boston and print the tide data
(graphically) for this month.

On the graph, draw a line connecting all the gravitational high tides. The draw and label
a line connecting all of the centrifugal high tides. Using today’s data:

a. What is the height of the gravitational high tide?_________________
b. What is the height of the centrifugal high tide? _________________
c. What is the range of the gravitational high tide? _________________
d. What is the range of the centrifugal high tide? _________________
e. What type of tide does Boston experience? __________________

Complete the following table, using the gravitational tides, indicating the heights and
ranges of the tide for the given phases of the moon and the given distances of the moon
on the dates indicated on the graph.

Table 1
Date                   Height                  Range
Perigee

Apogee

First Quarter

Full Moon

Third Quarter

New Moon

What does the data in Table 1 indicate about the variable that has the greatest effect on
the tidal range?
Part B: Nantucket

In the Harbor Master software open the tidal data for Nantucket and print the tide data
(graphically) for this month. Using today’s data:

f. What is the height of the gravitational high tide?_________________
g. What is the height of the centrifugal high tide? _________________
h. What is the range of the gravitational high tide? _________________
i. What is the range of the centrifugal high tide? _________________
j. What type of tide does Nantucket experience? __________________

Complete the following table, using the gravitational tides, indicating the heights and
ranges of the tide for the given phases of the moon and the given distances of the moon
on the dates indicated on the graph.

Table 2
Date                   Height                  Range
Perigee

Apogee

First Quarter

Full Moon

Third Quarter

New Moon

What does the data in Table 2 indicate about the variable that has the greatest effect on
the tidal range?

What observations can you make concerning the tides in Boston and the tides on
Nantucket?
Part C: Jack Bay, Louisiana

In the Harbor Master software open the tidal data for Jack Bay, LA and print the tide data
(graphically) for this month. Using today’s data:

k. What is the height of the gravitational high tide?_________________
l. What is the height of the centrifugal high tide? _________________
m. What is the range of the gravitational high tide? _________________
n. What is the range of the centrifugal high tide? _________________
o. What type of tide does Jack Bay experience? __________________
p. On what body of water is jack bay located? ___________________

Complete the following table, using the gravitational tides, indicating the heights and
ranges of the tide for the given phases of the moon and the given distances of the moon
on the dates indicated on the graph.

Table 3
Date                   Height                  Range
Perigee

Apogee

First Quarter

Full Moon

Third Quarter

New Moon

What does the data in Table 3 indicate about the variable that has the greatest effect on
the tidal range?
Part D: San Diego, California

In the Harbor Master software open the tidal data for San Diego, CA and print the tide
data (graphically) for this month. Using today’s data:

q. What is the height of the gravitational high tide?_________________
r. What is the height of the centrifugal high tide? _________________
s. What is the range of the gravitational high tide? _________________
t. What is the range of the centrifugal high tide? _________________
u. What type of tide does San Diego experience? __________________
v. On what body of water is San Diego, CA located? ___________________

Complete the following table, using the gravitational tides, indicating the heights and
ranges of the tide for the given phases of the moon and the given distances of the moon
on the dates indicated on the graph.

Table 4
Date                  Height                  Range
Perigee

Apogee

First Quarter

Full Moon

Third Quarter

New Moon

What does the data in Table 4 indicate about the variable that has the greatest effect on
the tidal range?
Part E: The Cape Cod Canal

Print out the tides for November 5 through 7 for the two following locations: The
Sagamore end of the Cape Cod Canal, and the Bourne bridge end of the Cape Cod Canal.

Table 5
Location               Time of High Tide       Height of High Tide    Range of Tide
(Nearest noon)
Sagamore

Bourne

w. How far apart are these two locations? ______________________
What does the data in Table 5 indicate about the variable that has the greatest effect on
the tidal time and tidal height and range?

_______________________________________

Lab Report
Purpose: Based on the data collected in this exercise, which variable (moon phase,
moon distance, or geography) has the most influence on tidal range and height?

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 views: 2 posted: 10/3/2012 language: English pages: 5