The addition of iron into ocean waters could drastically change the climate by allowing more carbon
dioxide from the atmosphere to be bound into carbohydrates via photosynthesis. Indicate whether the statement is true or false.
ANS: F
Although the addition of iron would temporarily increase the amount of photosynthesis, carbon is not
considered removed from the climate system until it is settled in sediments. Most of the carbon will reenter
the global carbon cycle. Information can be found in the section Lack of Nutrients and Light Can
Limit Primary Productivity.
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What is the typical depth of light penetration in the open ocean?
a. 40 meters b. 100 meters c. 330 meters d. 600 meters
How are oxygen isotopes used to determine ancient climate? What will be an ideal response?
An angular distance measured east or west of a prime meridian is termed
A) Greenwich distance. B) zenith. C) latitude. D) longitude.