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An Introduction to the World's Oceans, 10/e
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The History of Oceanography

Internet Exercises
Select "Earth Fact Sheet." Using the values given for the mass and volume of Earth, calculate the mean density of Earth in g/cm3. Using the values given for the radius of the core and the volume of Earth, calculate the percent of Earth's volume taken up by the core.
The way that scientists gather information about the ocean has changed dramatically since the first oceanographic expeditions set sail in the late 1700s. While ships are still used as platforms for exploration, many oceanographers now rely heavily on remote sensing data gathered by satellites orbiting our planet. Using information found on the above link, describe three types of oceanographic properties that can now be measured from space.
Select "A Walk Through Time" and then "World Time Scales and Time Zones." This exploration gives an opportunity to study time and worldwide temporal relationships.
a. What was the benefit in establishing the prime meridian?
b. Based on a 24-hour day and 360 degrees of longitude around the earth, how many degrees of longitude are included in an individual time zone?
c. Now go to and see the time differences around the world.