Answer to Question 1ANS: A
The USS Stewart was the first vessel to make a continuous profile of the ocean. They had an updated
version of the Iceberg Detector and Echo Depth Sounder, a device invented after the sinking of the
Titanic. Information can be found in the section Ocean Floor Is Mapped by Bathymetry.
Answer to Question 2ANS: C
There is a prevalence of active margins in the Pacific. These are areas associated with converging
plates and are characterized by high earthquake and volcanic activity. Recall the Pacific Ring of Fire
mentioned in Chapter 3. Information can be found in the section Continental Margins May Be Active
or Passive
Continuous variation in a natural population
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con
Dred Scott and his wife and children are featured on the cover of Frank Leslie’s Illustrated Newspap
The Morris Adjustable Chair, designed by Philip Webb, made by Morris, Marshall, Faulkner & Co.
Open-ocean systems vary in their biological diversity
The annual pattern of rings changes with ocean temperature and coral health